{"title":"U.2 NVMe (SFF-8639)","description":"\u003cp data-mce-fragment=\"1\"\u003e\u003cb data-mce-fragment=\"1\"\u003eHIGH SPEED MULTI-PROTOCOL DESIGN WITH FLEXIBILITIES\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSAS\/PCIe\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e4.0 (U.2\u0026amp;U.3) connectors come with 16GT\/s (PCIe\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003elanes) or 24Gb\/s (SAS lanes) speeds to meet the demands of next-generation servers. The 68-position, SAS\/PCIe\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003ereceptacle and header enables implementation of high speed Serial Attached SCSI (SAS) hard disk drive (HDD) interface as well as Peripheral Component Express (PCIe)-based devices. The molded guide post allows device plug and receptacle to self-align during mating process. With halogen-free high temperature thermoplastic, these connectors are made to withstand diverse conditions. It also offers a durability of 500 mating cycles.\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eCompatible with SFF8639 specification\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eCapable of meeting 24Gb\/s SSDs and HDDs or PCle\u003csup data-mce-fragment=\"1\"\u003e\u003c\/sup\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003ebased devices at 16GT\/s\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFootprint backward compatible to 12G, 6G and 3G SAS connectors\u003c\/li\u003e\n\u003c\/ul\u003e","products":[{"product_id":"m-2-to-u-2-nvme-ssd-adapter-sff-8639-75cm","title":"DiLinKer PCIe 4.0 U.2 NVMe SSD (SFF-8639) to M.2 Host Adapter, with SATA Power Cable, 75cm","description":"\u003cp\u003eA \u003cstrong\u003eU.2 (SFF-8639)\u003c\/strong\u003e drive on a motherboard that only has an \u003cstrong\u003eM.2\u003c\/strong\u003e slot free. This is the PCIe 4.0 version: the same card-and-cable arrangement, rated for Gen4 signalling and with 75 cm of cable instead of 50.\u003c\/p\u003e\n\u003ch2\u003eWhat the 4.0 rating buys you\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGen4-rated, for Gen4 drives.\u003c\/strong\u003e A Gen4 U.2 drive can sustain close to 7 GB\/s. Through a Gen4 slot and a Gen4-rated assembly it will; through a marginal Gen3-era adapter it may not train at Gen4 at all and will quietly fall back. This assembly is built for the higher signalling rate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirection: U.2 drive, M.2 host.\u003c\/strong\u003e The card sits in the M.2 slot, the 68-pin end goes to a 2.5″ U.2 SSD. It does not turn an M.2 SSD into a U.2 module — if that is what you need, it is the opposite adapter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12 V from the PSU, always.\u003c\/strong\u003e An M.2 slot gives you 3.3 V. A 2.5″ U.2 drive needs 12 V as well, so the SATA power lead in the box is part of the install, not an accessory.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75 cm so the drive can live in a bay.\u003c\/strong\u003e The extra 25 cm over the 50 cm version is what lets the drive sit in a proper 2.5″ cage while the card stays on the board — front-mounted cages in a full tower, or a drive sled on the far side of a long GPU.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIt is not a PCIe slot card.\u003c\/strong\u003e This installs in an M.2 socket, not in a PCIe slot. If your slots are free and the M.2 is the scarce resource, a PCIe x4 to U.2 cable is the cheaper answer: it uses a slot, leaves the M.2 free and needs no adapter card at all.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eHost side\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eM.2 M-key (PCIe x4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eDrive side\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eU.2 \/ SFF-8639, 68-pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eSATA 15-pin lead to the PSU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eCable length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e75 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eSignal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003ePCIe 4.0 x4 rated (~7.9 GB\/s ceiling)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eProtocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eNVMe over PCIe only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003ePart number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eRPC75-0056\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eB0CKT12PS3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWorks with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eM.2 M-key slots carrying PCIe lanes, Gen3 or Gen4\u003c\/li\u003e\n\u003cli\u003e2.5″ U.2 NVMe SSDs, including Gen4 models\u003c\/li\u003e\n\u003cli\u003eTower and rack builds with a free SATA power connector\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDoes not work with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSATA-only M.2 slots (B-key)\u003c\/li\u003e\n\u003cli\u003eTurning an M.2 SSD into a U.2 drive — wrong direction\u003c\/li\u003e\n\u003cli\u003eSAS or SATA 2.5″ drives\u003c\/li\u003e\n\u003cli\u003eU.3 drives without checking the pin assignment first\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTypical deployments\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGen4 U.2 drive in a Gen4 desktop board.\u003c\/strong\u003e The slot has the lanes, the drive has the speed; the adapter is the only thing missing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull-tower builds with front cages.\u003c\/strong\u003e 75 cm reaches a front 2.5″ cage from a board-mounted M.2 slot without strain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest benches.\u003c\/strong\u003e Move a U.2 drive between machines through the M.2 slot, which is usually the only free host interface on a modern board.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eDoes it need a SATA power connection?\u003c\/h3\u003e\n\u003cp\u003eYes. Without 12 V the drive will not come up. The lead is included.\u003c\/p\u003e\n\u003ch3\u003eDo I get Gen4 speeds?\u003c\/h3\u003e\n\u003cp\u003eOnly if the slot, the drive and the CPU\/chipset path are all Gen4. Any Gen3 link in the chain pulls the whole connection down to Gen3.\u003c\/p\u003e\n\u003ch3\u003eHow is this different from the 50cm version?\u003c\/h3\u003e\n\u003cp\u003eTwo things: 25 cm more cable, and a Gen4 signal rating. If your drive is Gen3 and the bay is close, the 50 cm version is cheaper.\u003c\/p\u003e\n\u003ch3\u003eCan I boot from it?\u003c\/h3\u003e\n\u003cp\u003eDepends on the board firmware, not on the adapter. Most current boards boot from NVMe on an M.2 slot; check yours if the machine is older.\u003c\/p\u003e\n\u003ch3\u003eWill a U.3 drive work?\u003c\/h3\u003e\n\u003cp\u003eDo not assume it. U.3 and U.2 share the 68-pin shell but not the pin assignment. Tell us the drive model and we will confirm before you order.\u003c\/p\u003e\n\u003ch3\u003eIs the card itself passive?\u003c\/h3\u003e\n\u003cp\u003eYes — no re-driver, no switch, nothing to configure. It carries the lanes straight through, which is also why it adds no measurable latency.\u003c\/p\u003e\n\u003ch2\u003eIn the box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × PCIe 4.0 U.2 (SFF-8639) to M.2 host adapter card\u003c\/li\u003e\n\u003cli\u003e1 × 75 cm cable\u003c\/li\u003e\n\u003cli\u003e1 × SATA power lead\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEvery cable is continuity- and pinout-tested before it ships and carries a 24-month warranty. If a link does not train, send us the controller model and the backplane part number before returning anything — in most cases the cable is the wrong variant for the port, not faulty, and we would rather tell you that up front.\u003c\/p\u003e\n\u003ch2\u003eRelated\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/dilinker-m-2-to-u-2-nvme-ssd-sff-8639-drive-to-m-2-host-adapter-u-2-ssd-converter-with-power-cable50cm\"\u003eSame adapter, 50cm, lower price\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/diliving-slimsas-4x-to-u-2-nvme-adapter-sff-8654-38p-to-sff-8639-68p-cable-with-power-75cm\"\u003eSlimSAS x4 to U.2 cable, 75cm\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/u-2-nvmesff-8639\"\u003eAll U.2 NVMe cables and adapters\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DiLinKer","offers":[{"title":"Default Title","offer_id":47981323747624,"sku":"B0CKT12PS3","price":33.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0866\/1460\/6120\/files\/1111_64a3ce5e-0d44-4035-ba12-0862f2553273.jpg?v=1712909690"},{"product_id":"diliving-pci-express-x16-to-4-slimsas-8x-expander-8-u-2-nvme-ssd-adapter-with-sff-8654-74-pin-connector-and-broadcom-plx8748-chipset-for-servers","title":"DiLinKer PCIe x16 to 4x SlimSAS 8X Adapter, 8x U.2 NVMe, SFF-8654 74-Pin, PLX8748, Full \u0026 Low Profile","description":"\u003cp\u003eFour \u003cstrong\u003eSlimSAS 8x (SFF-8654, 74-pin)\u003c\/strong\u003e ports on a single PCIe x16 slot, enough for \u003cstrong\u003eeight U.2 NVMe drives\u003c\/strong\u003e. The switching is done on the card by a Broadcom PLX8748, so the motherboard does not need bifurcation support and the drives do not need to share one x4 link at a time.\u003c\/p\u003e\n\u003ch2\u003eWhat the card actually does\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eA switch, not a splitter.\u003c\/strong\u003e A PLX8748 is a PCIe switch: one x16 uplink to the host, 32 lanes out to the drives, all non-blocking inside the chip. That is why this works in a plain x16 slot on a board that knows nothing about bifurcation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour ports, two drives each.\u003c\/strong\u003e Each 74-pin SlimSAS port carries eight lanes, which is exactly two U.2 drives at x4. Four ports therefore address eight drives. The cables are not in the box: you need four SlimSAS 8x to 2× U.2 assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe bandwidth maths, honestly.\u003c\/strong\u003e The uplink is Gen3 x16, about 15.75 GB\/s shared across eight drives. Eight Gen3 NVMe drives can each pull ~3.5 GB\/s on their own, so this is deliberately oversubscribed. For capacity, for sequential work on a few drives at a time and for anything that is not simultaneous full-speed reads on all eight, it is fine — and it is a fraction of the cost of a Gen4 switch card.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt for a chassis, not a desktop.\u003c\/strong\u003e Full-height bracket fitted, low-profile bracket in the box, 148 × 80 mm card. Designed for 2U and 4U servers where eight U.2 bays need feeding from one slot.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eHost interface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003ePCIe 3.0 x16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eDownstream ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e4 × SlimSAS 8x, SFF-8654, 74-pin (8 lanes each)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eDrive capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e8 × U.2 NVMe (SFF-8639), two per port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eSwitch chip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eBroadcom PLX PEX8748\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eDL-CNS44PE16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eCard size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e148 × 80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eBrackets\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eFull profile fitted, low profile included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eB0CG91X5ZG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWorks with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA free PCIe x16 slot — bifurcation support is not required\u003c\/li\u003e\n\u003cli\u003eU.2 NVMe drives via four SlimSAS 8x to 2× U.2 cables (sold separately)\u003c\/li\u003e\n\u003cli\u003eOcuLink (SFF-8611) backplanes, with the matching SlimSAS to OcuLink cable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDoes not work with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSAS or SATA drives — this card carries PCIe only\u003c\/li\u003e\n\u003cli\u003eBoards where the x16 slot is wired x8 — the uplink will not train as intended\u003c\/li\u003e\n\u003cli\u003eCables: none are included, and a plain SlimSAS 4x cable will only reach half the drives\u003c\/li\u003e\n\u003cli\u003eGen4 drives expecting Gen4 throughput — the switch is Gen3\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTypical deployments\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEight U.2 bays in a 2U server.\u003c\/strong\u003e One card replaces four separate x4 host links and leaves the rest of the slots free.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll-NVMe storage nodes.\u003c\/strong\u003e Capacity-dense arrays where the working set is spread across drives rather than hammering one at a time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorkstations with a big case.\u003c\/strong\u003e Eight U.2 drives in the front cages, all fed from the top x16 slot.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eDo the cables come with the card?\u003c\/h3\u003e\n\u003cp\u003eNo. You need four SlimSAS 8x (SFF-8654 74-pin) to 2× U.2 (SFF-8639) cables. We stock them; order four with the card.\u003c\/p\u003e\n\u003ch3\u003eDoes my motherboard need bifurcation?\u003c\/h3\u003e\n\u003cp\u003eNo. The PLX8748 handles the splitting. The slot only has to be a real x16.\u003c\/p\u003e\n\u003ch3\u003eWill it work in an x8 slot?\u003c\/h3\u003e\n\u003cp\u003eWe do not recommend it. The card expects x16; in an x8 slot it may link down or fail to enumerate at all, and eight drives on eight lanes is not a configuration we would ship.\u003c\/p\u003e\n\u003ch3\u003eCan I run fewer than eight drives?\u003c\/h3\u003e\n\u003cp\u003eYes. Populate one drive per port for four, or use both ends of a port for pairs. Empty ports cost nothing.\u003c\/p\u003e\n\u003ch3\u003eAre Gen4 drives wasted on it?\u003c\/h3\u003e\n\u003cp\u003eThey will run, at Gen3 speed. If you need Gen4 across eight drives, this is the wrong card — budget for a Gen4 switch instead.\u003c\/p\u003e\n\u003ch3\u003eWill the drives show up in the BIOS?\u003c\/h3\u003e\n\u003cp\u003eUsually as NVMe devices behind a switch. Boot support varies by firmware; if you need to boot from one of these drives, tell us the board model and we will check before you buy.\u003c\/p\u003e\n\u003ch2\u003eIn the box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × PCIe x16 to 4 × SlimSAS 8x switch card\u003c\/li\u003e\n\u003cli\u003e1 × low-profile bracket (full profile fitted)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEvery cable is continuity- and pinout-tested before it ships and carries a 24-month warranty. If a link does not train, send us the controller model and the backplane part number before returning anything — in most cases the cable is the wrong variant for the port, not faulty, and we would rather tell you that up front.\u003c\/p\u003e\n\u003ch2\u003eRelated\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/diliving-8-port-u-2-to-pci-express-x16-sff-8639-nvme-ssd-adapter-with-sff-8643-mini-sas-hd-36-pin-connector-and-plx8749-chipset-for-servers-lrnv9349-8i\"\u003e8-port U.2 card on SFF-8643 instead\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/slimsas-8x-to-2x-u-2-nvme-adapter-with-power-sff-8654-sff-8639-75cm\"\u003eSlimSAS 8x to 2x U.2 cable, 75cm\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/u-2-nvmesff-8639\"\u003eAll U.2 NVMe cables and adapters\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DiLinKer","offers":[{"title":"Default Title","offer_id":47981335019816,"sku":"B0CG91X5ZG","price":228.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0866\/1460\/6120\/files\/1111111.jpg?v=1712909873"},{"product_id":"diliving-pcie-4-0-slimssas-x4-to-u-3-nvme-adapter-sff-8654-38pin-to-sff-8639-68pin-cable-with-sata-power-75cm","title":"DiLinKer SlimSAS x4 (SFF-8654 38-Pin) to U.3 NVMe Cable, SFF-8639, with SATA Power, 75cm","description":"\u003cp\u003eA four-lane PCIe cable from \u003cstrong\u003eSlimSAS 4i (SFF-8654, 38-pin)\u003c\/strong\u003e to a \u003cstrong\u003eU.3\u003c\/strong\u003e drive on the 68-pin SFF-8639 shell, 75 cm, with a SATA power tail. Read the next paragraph before you buy: the connector looks like U.2 and is not wired like it.\u003c\/p\u003e\n\u003ch2\u003eU.3, not U.2 — and why that matters\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame shell, different pin assignment.\u003c\/strong\u003e U.3 kept the 68-pin SFF-8639 connector so a single bay could take NVMe, SAS or SATA drives, but it reassigned pins to do it. This cable is wired for the U.3 arrangement. Put a U.2 drive on it and it will usually not enumerate at all — no error, just no device.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated PCIe 4.0 x4.\u003c\/strong\u003e Four lanes at 16 GT\/s each, roughly 7.9 GB\/s of usable bandwidth, provided the host port and the drive are both Gen4. The 68-pin connector is not a speed limit — the drive and the host link decide the rate, not the shell.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe SATA tail feeds the drive.\u003c\/strong\u003e A 2.5″ U.3 SSD has no other power input; it needs 12 V and 5 V from the PSU. The 15-pin tail is part of the cable, not an optional extra.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e38-pin end where space is tight.\u003c\/strong\u003e SlimSAS shrank the 4i connector so more ports fit along a board edge. If your controller or riser exposes SFF-8654 rather than SFF-8643, this is the cable that reaches a U.3 bay.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eConnector A\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eSlimSAS 4i, SFF-8654, 38-pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eConnector B\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eU.3, SFF-8639, 68-pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eSATA 15-pin tail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eLanes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e4 (PCIe x4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e75 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eSignal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003ePCIe 4.0 x4 rated (~7.9 GB\/s)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eProtocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eNVMe on U.3 drives — not U.2, not SAS\/SATA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003ePart number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eRSL38-3600-AX1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eB0CBP5BKJS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWorks with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSlimSAS 4i host ports that carry PCIe lanes\u003c\/li\u003e\n\u003cli\u003eU.3 NVMe SSDs (the tri-mode pin arrangement)\u003c\/li\u003e\n\u003cli\u003eGen4 hosts and drives, which is where this cable earns its price\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDoes not work with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eU.2 drives\u003c\/strong\u003e — this is the single most common mistake with this cable\u003c\/li\u003e\n\u003cli\u003eSAS or SATA drives on the 68-pin end\u003c\/li\u003e\n\u003cli\u003e8-lane SlimSAS (74-pin) ports — those need an x8 fan-out cable\u003c\/li\u003e\n\u003cli\u003eU.3 backplane sockets — those need a cable with two plug ends\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTypical deployments\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGen4 U.3 drive on a SlimSAS controller.\u003c\/strong\u003e The controller exposes 38-pin ports; the drive is U.3; this is the one cable in the catalogue that joins them.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-drive scratch or cache disk.\u003c\/strong\u003e One U.3 drive off one SlimSAS port, powered from the PSU, no backplane involved.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRack builds with mixed drive generations.\u003c\/strong\u003e Keep U.3 drives on their own cabling so a U.2 drive never gets plugged into the wrong one by mistake.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eWill a U.2 drive work on this cable?\u003c\/h3\u003e\n\u003cp\u003eNo. That is the whole distinction. U.3 and U.2 share the physical 68-pin connector but not the pin assignment, so a U.2 drive normally does not enumerate. If your drive is U.2, take the U.2 version of this cable instead.\u003c\/p\u003e\n\u003ch3\u003eHow do I tell whether my drive is U.2 or U.3?\u003c\/h3\u003e\n\u003cp\u003eCheck the drive label or the vendor datasheet — U.3 parts are usually described as tri-mode. If you are unsure, send us the model number and we will tell you which cable to take. Getting this wrong is the number one return reason on this SKU.\u003c\/p\u003e\n\u003ch3\u003eIs it really PCIe 4.0?\u003c\/h3\u003e\n\u003cp\u003eThe assembly is rated for Gen4 signalling. Actual speed is set by the host port and the drive: any Gen3 link in the chain pulls it back to Gen3.\u003c\/p\u003e\n\u003ch3\u003eDo I need the SATA power tail?\u003c\/h3\u003e\n\u003cp\u003eYes. A 2.5″ U.3 SSD has no other power input.\u003c\/p\u003e\n\u003ch3\u003eCan I run SAS or SATA drives on it?\u003c\/h3\u003e\n\u003cp\u003eNot with this cable. The 68-pin end here is wired for NVMe on U.3.\u003c\/p\u003e\n\u003ch3\u003eMy drive powers up but is not detected — what now?\u003c\/h3\u003e\n\u003cp\u003eFirst check the drive is U.3 rather than U.2. Second, confirm the SlimSAS port carries PCIe lanes and not SAS. Third, try another port. If it still does not appear, send us the drive model and the controller model and we will work it out with you.\u003c\/p\u003e\n\u003ch2\u003eIn the box\u003c\/h2\u003e\n\u003cul\u003e\u003cli\u003e1 × SlimSAS 4i (SFF-8654) to U.3 (SFF-8639) cable, 75 cm, with SATA power\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eEvery cable is continuity- and pinout-tested before it ships and carries a 24-month warranty. If a link does not train, send us the controller model and the backplane part number before returning anything — in most cases the cable is the wrong variant for the port, not faulty, and we would rather tell you that up front.\u003c\/p\u003e\n\u003ch2\u003eRelated\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/diliving-slimsas-4x-to-u-2-nvme-adapter-sff-8654-38p-to-sff-8639-68p-cable-with-power-75cm\"\u003eSlimSAS x4 to U.2 cable — the U.2 version\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/slimsas-8x-to-2x-u-2-nvme-adapter-with-power-sff-8654-sff-8639-75cm\"\u003eSlimSAS 8x to 2x U.2 cable, 75cm\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/slimsassff-8654\"\u003eAll SlimSAS (SFF-8654) cables\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DiLinKer","offers":[{"title":"Default Title","offer_id":47981337641256,"sku":"B0CBP5BKJS","price":33.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0866\/1460\/6120\/files\/1-22.jpg?v=1712909770"},{"product_id":"diliving-pcie-4-0-x4-to-u-2-sff-8639-nvme-ssd-70cm-cable-no-additional-power-plug-required","title":"DiLinKer PCIe 4.0 x4 to U.2 NVMe Cable, SFF-8639 68-Pin, 70cm, Slot-Powered (No Extra Power Plug)","description":"\u003cp\u003eA cable that turns a standard \u003cstrong\u003ePCIe x4 slot\u003c\/strong\u003e into a U.2 drive connector: a card-edge plug on one end, a \u003cstrong\u003e68-pin SFF-8639\u003c\/strong\u003e plug on the other, 70 cm between them. There is no power tail, because the drive is fed straight from the slot — which is the whole point of this part, and also the reason it has a power budget you should check before you buy.\u003c\/p\u003e\n\u003ch2\u003eWhy buy this instead of a U.2 adapter card\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo power lead to route.\u003c\/strong\u003e The x4 slot carries up to 25 W over its 12 V and 3.3 V rails, and this assembly passes that straight to the drive. Nothing to plug into the PSU, nothing to hide behind the motherboard tray — worth a lot in a small chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe drive stays in a proper bay.\u003c\/strong\u003e An adapter card hangs a 2.5″ SSD off the back of the card, which not every chassis can support. With this cable the drive goes where it belongs, in a cage or on a tray, and only the cable reaches the slot. Better airflow, better vibration behaviour.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e68-pin connector, not a card-edge compromise.\u003c\/strong\u003e The drive side is a real SFF-8639 plug with the full pin field, so it seats the way a U.2 connector is meant to seat, and it survives being unplugged repeatedly far better than an adapter that relies on a press-fit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonest note on PCIe 4.0 and 70 cm.\u003c\/strong\u003e The assembly is listed for Gen4 and works on Gen4 in our testing, but 70 cm of passive copper is close to the edge of what Gen4 tolerates. Some boards will train at Gen4, some will drop to Gen3 and be perfectly happy there. You lose bandwidth in the second case, never the drive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eHost side\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003ePCIe x4 card-edge (plugs into any x4, x8 or x16 slot)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eDrive side\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eU.2 \/ SFF-8639, 68-pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e70 cm end to end\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eFrom the PCIe slot — no SATA or Molex lead required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eListed signal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003ePCIe 4.0 x4 (Gen3\/Gen2\/Gen1 backward compatible)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eProtocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eNVMe over PCIe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eB09S3C1BSR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWorks with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesktop, workstation and server boards with a free x4 (or larger) PCIe slot\u003c\/li\u003e\n\u003cli\u003e2.5″ U.2 NVMe SSDs — Intel DC P3500 \/ P3600 \/ P3700, Samsung XS1715, OCZ Z-Drive 6000, HGST Ultrastar SN100 and later drives from any vendor\u003c\/li\u003e\n\u003cli\u003eChassis with a 2.5″ bay within 70 cm of the slot\u003c\/li\u003e\n\u003cli\u003eBuilds where you cannot or will not route another power lead\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDoes not work with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDrives that draw more than the slot can supply — most enterprise U.2 SSDs sit inside the budget, but high-power and PLP-heavy models may not; check the drive’s datasheet\u003c\/li\u003e\n\u003cli\u003eSAS or SATA drives — the 68-pin end is PCIe-wired\u003c\/li\u003e\n\u003cli\u003eU.2 backplanes, which need an 8643-to-8643 or an 8654-to-8643 cable\u003c\/li\u003e\n\u003cli\u003ex1 or x2 slots — the drive needs four lanes to enumerate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTypical deployments\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact workstation, one free x4 slot, no spare power lead.\u003c\/strong\u003e Drive in the 2.5″ bay, cable to the slot, done — no adapter card and no SATA power run.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExisting tower with a U.2 drive pulled from a server.\u003c\/strong\u003e Reuse the drive in a desktop without buying a backplane or a RAID card.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBench rig where you swap drives often.\u003c\/strong\u003e The 68-pin plug takes repeated mating cycles better than a press-fit adapter.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eNo power connector at all — how does the drive run?\u003c\/h3\u003e\n\u003cp\u003eFrom the slot. A PCIe x4 slot provides 12 V and 3.3 V, and this cable passes both to the 68-pin connector. That is enough for most 2.5″ U.2 SSDs, which is why the design works at all — but it is not unlimited, so check the drive’s power figure if it is a high-end enterprise model.\u003c\/p\u003e\n\u003ch3\u003eWill it really run at PCIe 4.0?\u003c\/h3\u003e\n\u003cp\u003eOn most Gen4 boards, yes; on some, the link will negotiate down to Gen3. At 70 cm of passive copper there is very little margin left, and we would rather tell you that than promise a number your board may not hit. Either way the drive works — Gen3 x4 still gives you around 3.5 GB\/s.\u003c\/p\u003e\n\u003ch3\u003eCan I use it in an x16 slot?\u003c\/h3\u003e\n\u003cp\u003eYes. A card-edge x4 plug fits any x4, x8 or x16 slot and uses the first four lanes. It will not give you more bandwidth in a wider slot — the drive is a four-lane device.\u003c\/p\u003e\n\u003ch3\u003eDoes it work in a bifurcated slot?\u003c\/h3\u003e\n\u003cp\u003eIt occupies the first four lanes of whatever slot it is in. Bifurcation splits a slot into independent x4 links, so as long as one of those links is free, the cable works normally.\u003c\/p\u003e\n\u003ch3\u003eWhat is the difference between this and your U.2 adapter card?\u003c\/h3\u003e\n\u003cp\u003eWhere the drive lives. The adapter card mounts the SSD on the card itself and needs no cable; this cable lets the drive sit in a chassis bay, which is better for airflow and for chassis that cannot support a drive hanging off a card. Both use four PCIe lanes and both are slot-powered.\u003c\/p\u003e\n\u003ch3\u003eDrive is not detected after installation — where do I look?\u003c\/h3\u003e\n\u003cp\u003eSlot first (some boards disable x4 slots when an M.2 drive is fitted, or share lanes with SATA ports), then the 68-pin seating, then the drive’s own power budget. If the drive spins up but never appears in the OS, send us the board model and the SSD model.\u003c\/p\u003e\n\u003ch2\u003eIn the box\u003c\/h2\u003e\n\u003cul\u003e\u003cli\u003e1 × PCIe x4 to U.2 (SFF-8639) NVMe cable, 70 cm, slot-powered (SKU B09S3C1BSR)\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eEvery cable is continuity- and pinout-tested before it ships and carries a 24-month warranty. If a link does not train, send us the controller model and the backplane part number before returning anything — in most cases the cable is the wrong variant for the port, not faulty, and we would rather tell you that up front.\u003c\/p\u003e\n\u003ch2\u003eRelated\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/diliving-pcie-to-nvme-u-2-adapter-pcie-4x-to-sff-8639-interface-for-2-5-nvme-ssdpex4sff8639\"\u003ePrefer the drive mounted on the card? PCIe x4 to U.2 adapter\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/dilinker-75cm-hd-mini-sassff-8643-to-u-2-sff-8639-nvme-ssd-cable\"\u003eHave an SFF-8643 port instead of a slot?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/u-2-nvmesff-8639\"\u003eAll U.2 \/ NVMe cables and adapters\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DiLinKer","offers":[{"title":"Default Title","offer_id":47981350584616,"sku":"B09S3C1BSR","price":23.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0866\/1460\/6120\/files\/11.jpg?v=1712124596"},{"product_id":"diliving-slimsas-4x-to-u-2-nvme-adapter-sff-8654-38p-to-sff-8639-68p-cable-with-power-75cm","title":"DiLinKer SlimSAS 4X to U.2 NVMe Adapter, SFF-8654 38P to SFF-8639 68P Cable with Power, 75cm","description":"\u003cp\u003eOne SlimSAS 4x port (SFF-8654, 38-pin) to one U.2 NVMe drive (SFF-8639), with the power branch built into the assembly. This is the single-drive version of our SlimSAS-to-U.2 family — the tidy way to hang a 2.5-inch NVMe SSD off a tri-mode controller, a PCIe switch card or a board header with one 38-pin port to spare.\u003c\/p\u003e\n\u003ch2\u003eWhy this cable\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne port, one drive.\u003c\/strong\u003e A clean x4 link from a SlimSAS 4x host to a U.2 SSD — nothing shared, nothing split.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower built into the assembly.\u003c\/strong\u003e The drive’s power arrives with the data cable; no separate U.2 power adapter needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSAS 4.0-class signalling.\u003c\/strong\u003e Handles PCIe and SAS traffic up to the host port’s rating; negotiates down automatically.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75 cm reach.\u003c\/strong\u003e Standard controller-to-bay routing inside towers and 2U chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePassive assembly.\u003c\/strong\u003e No firmware, no driver, nothing to configure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;font-size:14px;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eHost connector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eSlimSAS 4x, SFF-8654, 38-pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eDevice interface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eU.2 NVMe, SFF-8639\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eIntegrated power branch for the drive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eLane configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e4 lanes, 1:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eInterface speed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eUp to 24 Gb\/s per lane (SAS 4.0 class)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e75 cm \/ 29.5 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003ePart number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eRSL38-2309-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eB099DYK9CW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e24 months\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWorks with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTri-mode and NVMe-capable controllers and boards with SlimSAS 4x (38-pin) ports.\u003c\/li\u003e\n\u003cli\u003e2.5-inch U.2 (SFF-8639) NVMe SSDs.\u003c\/li\u003e\n\u003cli\u003eChassis with standard internal drive power for the branch.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDoes not work with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSlimSAS 8x (74-pin) hosts — use the SlimSAS 8x to 2×U.2 cable for those.\u003c\/li\u003e\n\u003cli\u003eU.2 drives behind a backplane — run the host cable to the backplane port instead.\u003c\/li\u003e\n\u003cli\u003eSAS-only hosts driving NVMe drives — the protocol follows the host port.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTypical deployments\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-drive boot tier.\u003c\/strong\u003e One fast U.2 SSD off a spare 38-pin port.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCache or journal drives.\u003c\/strong\u003e Dedicated x4 links for write-intensive SSDs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncremental expansion.\u003c\/strong\u003e Add U.2 drives one at a time as 4x ports free up.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eDo I need a separate power cable for the drive?\u003c\/h3\u003e\n\u003cp\u003eNo. The assembly includes the drive power branch, so one cable does data and power.\u003c\/p\u003e\n\u003ch3\u003eHow is this different from the 2-drive version?\u003c\/h3\u003e\n\u003cp\u003eThe 2-drive version starts from a SlimSAS 8x 74-pin port and splits into two U.2 drives. This one is a single x4 link for a single drive from a 38-pin port.\u003c\/p\u003e\n\u003ch3\u003eWill it work with a SAS host?\u003c\/h3\u003e\n\u003cp\u003eFor SAS traffic, yes. For NVMe drives, the host port must carry PCIe — a SAS-only controller will not enumerate an NVMe SSD.\u003c\/p\u003e\n\u003ch3\u003eIs the length right for my chassis?\u003c\/h3\u003e\n\u003cp\u003e75 cm covers most controller-to-bay runs in towers and 2U servers. Route it away from power cables and sharp edges for the cleanest signal.\u003c\/p\u003e\n\u003ch2\u003eIn the box\u003c\/h2\u003e\n\u003cul\u003e\u003cli\u003e1 × SlimSAS 4x to U.2 NVMe adapter cable with power, 75 cm (SKU B099DYK9CW)\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eBacked by a 24-month warranty. If a link trains at reduced width or does not appear, contact us with your controller and device models and we will help you isolate the cause.\u003c\/p\u003e\n\u003ch2\u003eRelated\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/diliving.com\/collections\/u-2-nvmesff-8639\"\u003eAll U.2 NVMe (SFF-8639) cables\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/diliving.com\/collections\/slimsassff-8654\"\u003eAll SlimSAS (SFF-8654) cables\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/diliving.com\/products\/diliving-slimsas-8x-to-2-u-2-nvme-adapter-sff-8654-74pin-to-2-sff-8639-68pin-cable-with-power-75cmbroadcom-mpn-05-60005-00-cbl-sast-0953\"\u003eSlimSAS 8X to 2× U.2 NVMe Adapter with power, 75 cm\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DiLinKer","offers":[{"title":"Default Title","offer_id":47981354778920,"sku":"B099DYK9CW","price":21.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0866\/1460\/6120\/files\/2309.jpg?v=1713147877"},{"product_id":"slimsas-8x-to-2x-u-2-nvme-adapter-with-power-sff-8654-sff-8639-75cm","title":"DiLinKer SlimSAS 8X to 2*U.2 NVMe Adapter, SFF-8654 74pin to 2*SFF-8639 68pin Cable with Power, 75cm(Broadcom MPN 05-60005-00, CBL-SAST-0953)","description":"\u003cp\u003eTwo U.2 NVMe drives from one SlimSAS 8x port, power included. This assembly starts at the SlimSAS 74-pin connector (SFF-8654) and terminates in two U.2 (SFF-8639) drive interfaces, each with its power branch built in. It is the standard companion cable for NVMe-capable RAID and tri-mode controllers, and it follows the Broadcom 05-60005-00 (CBL-SAST-0953) pinout and form factor.\u003c\/p\u003e\n\u003ch2\u003eWhy this cable\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo U.2 drives, one host port.\u003c\/strong\u003e A single 8x connector serves two SFF-8639 drives, four lanes each.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower built into the assembly.\u003c\/strong\u003e Each U.2 leg carries its power branch — no separate drive power adapters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroadcom-compatible pinout.\u003c\/strong\u003e Built to the 05-60005-00 \/ CBL-SAST-0953 specification used by NVMe RAID controllers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75 cm reach.\u003c\/strong\u003e Comfortable for controller-to-bay routing in 2U chassis and towers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePassive assembly.\u003c\/strong\u003e No bridge chip, no firmware, no driver.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;font-size:14px;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eHost connector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eSlimSAS 8x, SFF-8654, 74-pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eDevice interfaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e2 × U.2 NVMe, SFF-8639\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eIntegrated power branch on each U.2 leg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eLane configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e8 host lanes → 2 × 4 drive lanes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eReference part\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eBroadcom MPN 05-60005-00 \/ CBL-SAST-0953 pinout\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e75 cm \/ 29.5 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003ePart number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e05-60005-00 \/ CBL-SAST-0953\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eB098JBS7QD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e24 months\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWorks with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNVMe-capable RAID and tri-mode controllers with SlimSAS 8x ports, including Broadcom 9400\/9600 series NVMe designs.\u003c\/li\u003e\n\u003cli\u003e2.5-inch U.2 (SFF-8639) NVMe SSDs.\u003c\/li\u003e\n\u003cli\u003eBoards with SlimSAS 8x headers carrying PCIe.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDoes not work with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSAS-only hosts — they will not enumerate NVMe drives.\u003c\/li\u003e\n\u003cli\u003eU.2 drives behind a backplane — run the host cable to the backplane port instead.\u003c\/li\u003e\n\u003cli\u003eSlimSAS 4x (38-pin) hosts — this assembly is 8x on the host side.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTypical deployments\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNVMe RAID arrays.\u003c\/strong\u003e Two U.2 SSDs per 8x port on an NVMe RAID controller.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoot tier.\u003c\/strong\u003e A fast U.2 pair hanging off a tri-mode HBA.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM replacement.\u003c\/strong\u003e A drop-in assembly for controllers specified with the 05-60005-00 cable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eIs this an original Broadcom cable?\u003c\/h3\u003e\n\u003cp\u003eNo. It is DiLinKer’s assembly built to the same pinout and form factor as Broadcom’s 05-60005-00 (CBL-SAST-0953), so it plugs into the same controllers and drives.\u003c\/p\u003e\n\u003ch3\u003eDo I need separate power for the drives?\u003c\/h3\u003e\n\u003cp\u003eNo. Each U.2 leg includes its power branch, fed from a standard internal power source.\u003c\/p\u003e\n\u003ch3\u003eWill both drives run at full speed?\u003c\/h3\u003e\n\u003cp\u003eEach drive gets its own four-lane link. Two Gen4 drives saturate the 8x host port together; two Gen3 drives do not come close.\u003c\/p\u003e\n\u003ch3\u003eCan I attach just one drive?\u003c\/h3\u003e\n\u003cp\u003eYes. The second leg can be left unconnected — the first drive enumerates normally.\u003c\/p\u003e\n\u003ch2\u003eIn the box\u003c\/h2\u003e\n\u003cul\u003e\u003cli\u003e1 × SlimSAS 8x to 2 × U.2 NVMe adapter cable with power, 75 cm (SKU B098JBS7QD)\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eBacked by a 24-month warranty. If a link trains at reduced width or does not appear, contact us with your controller and device models and we will help you isolate the cause.\u003c\/p\u003e\n\u003ch2\u003eRelated\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/diliving.com\/collections\/u-2-nvmesff-8639\"\u003eAll U.2 NVMe (SFF-8639) cables\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/diliving.com\/collections\/slimsassff-8654\"\u003eAll SlimSAS (SFF-8654) cables\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/diliving.com\/products\/diliving-slimsas-4x-to-u-2-nvme-adapter-sff-8654-38p-to-sff-8639-68p-cable-with-power-75cm\"\u003eSlimSAS 4X to U.2 NVMe Adapter with power, 75 cm\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DiLinKer","offers":[{"title":"Default Title","offer_id":47981356974376,"sku":"B098JBS7QD","price":28.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0866\/1460\/6120\/files\/3333.jpg?v=1713256234"},{"product_id":"diliving-8-port-u-2-to-pci-express-x16-sff-8639-nvme-ssd-adapter-with-sff-8643-mini-sas-hd-36-pin-connector-and-plx8749-chipset-for-servers-lrnv9349-8i","title":"DiLinKer 8-Port U.2 NVMe to PCIe x16 Adapter, 8x SFF-8643 MiniSAS HD, PLX8749, LRNV9349-8I","description":"\u003cp\u003eEight \u003cstrong\u003eU.2 NVMe drives\u003c\/strong\u003e from one PCIe x16 slot, through eight \u003cstrong\u003eSFF-8643 (MiniSAS HD)\u003c\/strong\u003e ports and a Broadcom \u003cstrong\u003ePLX8749\u003c\/strong\u003e switch. This is the version to take if your cables and backplanes are already 8643 — the older, cheaper, far more common connector.\u003c\/p\u003e\n\u003ch2\u003eWhy 8643 rather than SlimSAS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEight x4 ports behind one switch.\u003c\/strong\u003e The PLX8749 is a 48-lane switch: sixteen lanes up to the host, four lanes out to each of eight ports. Every drive gets a genuine x4 link, and none of them depend on the motherboard understanding bifurcation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8643 is the connector your shelf already uses.\u003c\/strong\u003e SlimSAS is smaller and newer; SFF-8643 is what most existing U.2 backplanes, cables and drive cages in the field are built around. If you are expanding an older chassis rather than building new, this card avoids re-cabling the whole box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEight cables, one card.\u003c\/strong\u003e Each port takes a single SFF-8643 to U.2 (SFF-8639) cable. Cables are not included — budget for eight of them, or tell us the drive count and we will put the right set together.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBandwidth, stated plainly.\u003c\/strong\u003e Gen3 x16 to the host is about 15.75 GB\/s shared across eight drives. Eight Gen3 drives can saturate that between them, so this card is oversubscribed by design. It is the right trade for capacity and for workloads that do not read all eight at full speed at once.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhere the drive power comes from.\u003c\/strong\u003e The card supplies PCIe only. If your drives sit in a U.2 backplane, the cage powers them. If you are running bare 8643-to-U.2 cables instead, each of those cables carries its own SATA power tail and every drive needs a free PSU connector — eight of them. Count your PSU leads before you plan the build; this is the step people forget.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoth brackets in the box.\u003c\/strong\u003e The full-height bracket is fitted; a low-profile one is included, because this card goes into 1U and 2U chassis as often as into a tower. 148 × 80 mm, so it clears a standard riser without overhanging the neighbouring slot.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eHost interface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003ePCIe 3.0 x16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eDrive ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e8 × SFF-8643, MiniSAS HD, 36-pin (x4 each)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eDrive capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e8 × U.2 NVMe (SFF-8639)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eSwitch chip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eBroadcom PLX PEX8749\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eLRNV9349-8I\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eCard size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e148 × 80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eBrackets\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eFull profile fitted, low profile included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eB089SQ9HPX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWorks with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA free PCIe x16 slot, no bifurcation needed\u003c\/li\u003e\n\u003cli\u003eU.2 NVMe drives through eight 8643-to-U.2 cables (sold separately)\u003c\/li\u003e\n\u003cli\u003eExisting SFF-8643 backplanes and drive cages\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDoes not work with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSAS or SATA drives on the drive ports — PCIe only\u003c\/li\u003e\n\u003cli\u003ex8 slots: the uplink expects sixteen lanes\u003c\/li\u003e\n\u003cli\u003eSlimSAS 8654 backplanes without an adapter cable\u003c\/li\u003e\n\u003cli\u003eCables are not included in the box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTypical deployments\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpanding an existing 8643 chassis.\u003c\/strong\u003e Eight more U.2 drives without changing a single cable in the shelf.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2U all-NVMe nodes.\u003c\/strong\u003e One slot, eight drives, two brackets so it fits either chassis height.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArchive and capacity tiers.\u003c\/strong\u003e Dense NVMe capacity where aggregate throughput matters more than any single drive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eHow many cables do I need?\u003c\/h3\u003e\n\u003cp\u003eEight: one SFF-8643 to U.2 (SFF-8639) cable per drive. We stock them and can bundle the right quantity.\u003c\/p\u003e\n\u003ch3\u003eDoes the board need bifurcation?\u003c\/h3\u003e\n\u003cp\u003eNo. The PLX8749 does the switching. A plain x16 slot is all that is required.\u003c\/p\u003e\n\u003ch3\u003eWill it work in an x8 slot?\u003c\/h3\u003e\n\u003cp\u003eNot reliably. The card is designed around a x16 uplink.\u003c\/p\u003e\n\u003ch3\u003eCan I use Gen4 drives?\u003c\/h3\u003e\n\u003cp\u003eThey will run at Gen3 speed through this switch. For Gen4 across eight drives you need a Gen4 switch card.\u003c\/p\u003e\n\u003ch3\u003eWhat is in the box?\u003c\/h3\u003e\n\u003cp\u003eThe card and a low-profile bracket. The full-height bracket is already fitted. No cables.\u003c\/p\u003e\n\u003ch3\u003eDo my drives need individual power?\u003c\/h3\u003e\n\u003cp\u003eThrough a U.2 backplane, no — the cage powers them. With bare 8643-to-U.2 cables, each cable carries the drive power tail.\u003c\/p\u003e\n\u003ch2\u003eIn the box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × 8-port U.2 NVMe to PCIe x16 switch card (LRNV9349-8I)\u003c\/li\u003e\n\u003cli\u003e1 × low-profile bracket (full profile fitted)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEvery cable is continuity- and pinout-tested before it ships and carries a 24-month warranty. If a link does not train, send us the controller model and the backplane part number before returning anything — in most cases the cable is the wrong variant for the port, not faulty, and we would rather tell you that up front.\u003c\/p\u003e\n\u003ch2\u003eRelated\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/diliving-4-port-u-2-to-pci-express-x8-sff-8639-nvme-ssd-adapter-with-sff-8643-mini-sas-hd-36-pin-connector-and-plx8724-chipset-for-servers-lrnv9324-4i\"\u003e4-port version on PCIe x8\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/diliving-pci-express-x16-to-4-slimsas-8x-expander-8-u-2-nvme-ssd-adapter-with-sff-8654-74-pin-connector-and-broadcom-plx8748-chipset-for-servers\"\u003eSlimSAS 8x version, 4 ports to 8 drives\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/minisas-hdsff-8643\"\u003eAll MiniSAS HD (SFF-8643) cables\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DiLinKer","offers":[{"title":"Default Title","offer_id":47981358350632,"sku":"B089SQ9HPX","price":288.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0866\/1460\/6120\/files\/41GtrLCRXEL.jpg?v=1712028002"},{"product_id":"diliving-4-port-u-2-to-pci-express-x8-sff-8639-nvme-ssd-adapter-with-sff-8643-mini-sas-hd-36-pin-connector-and-plx8724-chipset-for-servers-lrnv9324-4i","title":"DiLinKer 4-Port U.2 NVMe to PCIe x8 Adapter, 4x SFF-8643 MiniSAS HD, PLX8724, LRNV9324-4I","description":"\u003cp\u003eFour \u003cstrong\u003eU.2 NVMe drives\u003c\/strong\u003e from a \u003cstrong\u003ePCIe x8\u003c\/strong\u003e slot, through four \u003cstrong\u003eSFF-8643\u003c\/strong\u003e ports and a Broadcom \u003cstrong\u003ePLX8724\u003c\/strong\u003e switch. Half the drives and half the slot width of the 8-port card, at a lower price — the right shape for a 1U chassis or a board whose x16 slot is already taken.\u003c\/p\u003e\n\u003ch2\u003eWhen four drives and eight lanes are the right fit\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour genuine x4 links.\u003c\/strong\u003e The PLX8724 is a 24-lane switch: eight lanes up, four lanes out per port. Every drive gets a full x4 connection, and the host does not need bifurcation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHalf-height slot, half the price.\u003c\/strong\u003e An x8 slot is far easier to find free than an x16, especially in 1U servers and in boards where the x16 is holding a GPU. This card fits that gap without paying for eight ports you will not populate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8643 keeps your existing cabling.\u003c\/strong\u003e SFF-8643 is the connector most installed U.2 cages and backplanes already use. Four 8643-to-U.2 cables and you are done — cables are not in the box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe bandwidth picture.\u003c\/strong\u003e Gen3 x8 to the host is about 7.9 GB\/s shared across four drives. That is enough for most real workloads and honest about the rest: four drives reading flat out at once will queue.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot just two x4 cables in a slot.\u003c\/strong\u003e A board with two spare x4 slots and two x4-to-U.2 cables reaches four drives already. This card earns its place when the slots are not there — a 1U chassis with one riser, or a board whose second slot is blocked by a cooler — and when you want the four drives presented as one managed group behind one switch rather than four independent host links.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits where an x16 card will not.\u003c\/strong\u003e 148 × 80 mm with both brackets supplied, so it goes into a 1U riser as readily as into a tower. If your only free slot is a physical x16 wired for x8, this card links at x8 width and works — the 8-port version would not.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eHost interface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003ePCIe 3.0 x8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eDrive ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e4 × SFF-8643, MiniSAS HD, 36-pin (x4 each)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eDrive capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e4 × U.2 NVMe (SFF-8639)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eSwitch chip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eBroadcom PLX PEX8724\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eLRNV9324-4I\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eCard size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e148 × 80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eBrackets\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eFull profile fitted, low profile included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eB089SQ84CH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWorks with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA free PCIe x8 slot (x16 slots work too, at x8 width)\u003c\/li\u003e\n\u003cli\u003eU.2 NVMe drives through four 8643-to-U.2 cables, sold separately\u003c\/li\u003e\n\u003cli\u003e1U and 2U chassis with four U.2 bays\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDoes not work with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSAS or SATA drives — PCIe only\u003c\/li\u003e\n\u003cli\u003eMore than four drives; there is no second tier of ports\u003c\/li\u003e\n\u003cli\u003eSlimSAS backplanes without an adapter cable\u003c\/li\u003e\n\u003cli\u003eCables are not included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTypical deployments\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1U server with four NVMe bays.\u003c\/strong\u003e The card is short enough for a riser and does not need the x16 slot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorkstation with the x16 taken.\u003c\/strong\u003e Put the storage switch on x8 and leave x16 for the GPU.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall all-NVMe nodes.\u003c\/strong\u003e Four drives, one switch, no bifurcation and no backplane re-cabling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eHow many cables do I need?\u003c\/h3\u003e\n\u003cp\u003eFour — one SFF-8643 to U.2 cable per drive. Not included.\u003c\/p\u003e\n\u003ch3\u003eWill it work in an x16 slot?\u003c\/h3\u003e\n\u003cp\u003eYes, it will link at x8 width. The slot just has to be open-ended or physically x16.\u003c\/p\u003e\n\u003ch3\u003eDoes the board need bifurcation?\u003c\/h3\u003e\n\u003cp\u003eNo. The switch handles it.\u003c\/p\u003e\n\u003ch3\u003eFour drives on eight lanes — is that enough?\u003c\/h3\u003e\n\u003cp\u003eIt is about 7.9 GB\/s shared. Fine for mixed and sequential work; four simultaneous full-speed reads will queue. If that is your workload, take the 8-port x16 card.\u003c\/p\u003e\n\u003ch3\u003eCan I mix drive sizes and models?\u003c\/h3\u003e\n\u003cp\u003eYes. Each port is independent, so drives of different capacities and vendors coexist without issue.\u003c\/p\u003e\n\u003ch3\u003eWhat is in the box?\u003c\/h3\u003e\n\u003cp\u003eThe card with the full-height bracket fitted, plus a low-profile bracket. No cables.\u003c\/p\u003e\n\u003ch2\u003eIn the box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × 4-port U.2 NVMe to PCIe x8 switch card (LRNV9324-4I)\u003c\/li\u003e\n\u003cli\u003e1 × low-profile bracket (full profile fitted)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEvery cable is continuity- and pinout-tested before it ships and carries a 24-month warranty. If a link does not train, send us the controller model and the backplane part number before returning anything — in most cases the cable is the wrong variant for the port, not faulty, and we would rather tell you that up front.\u003c\/p\u003e\n\u003ch2\u003eRelated\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/diliving-8-port-u-2-to-pci-express-x16-sff-8639-nvme-ssd-adapter-with-sff-8643-mini-sas-hd-36-pin-connector-and-plx8749-chipset-for-servers-lrnv9349-8i\"\u003e8-port version on PCIe x16\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/diliving-pci-express-x16-to-4-slimsas-8x-expander-8-u-2-nvme-ssd-adapter-with-sff-8654-74-pin-connector-and-broadcom-plx8748-chipset-for-servers\"\u003eSlimSAS 8x version, 4 ports to 8 drives\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/minisas-hdsff-8643\"\u003eAll MiniSAS HD (SFF-8643) cables\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DiLinKer","offers":[{"title":"Default Title","offer_id":47981359628584,"sku":"B089SQ84CH","price":238.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0866\/1460\/6120\/files\/41I7EbrYQ8L.jpg?v=1712028023"},{"product_id":"dilinker-75cm-hd-mini-sassff-8643-to-u-2-sff-8639-nvme-ssd-cable","title":"DiLinKer MiniSAS HD (SFF-8643) to U.2 NVMe Cable, SFF-8639 68-Pin, 75cm, with SATA Power","description":"\u003cp\u003eThe long version of our SFF-8643 to U.2 cable: same four PCIe lanes, same 68-pin drive connector, same SATA power tail, but \u003cstrong\u003e75 cm\u003c\/strong\u003e of run so the drive can live in a front cage while the port sits at the back of the board. It is the length most 4U and tower builds actually need, and the one people end up buying twice when they start with a 50 cm cable and find it does not reach.\u003c\/p\u003e\n\u003ch2\u003eWhy the extra 25 cm matters\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRouting distance, not straight-line distance.\u003c\/strong\u003e A drive in the front cage of a 4U chassis is often 60–70 cm of cable path from a rear PCIe slot once you go around the fan wall. 50 cm cables get pulled taut in that layout, and a taut cable loads the 68-pin connector — the usual cause of a drive that drops out under vibration but works on the bench.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePCIe lanes only — the SAS trap.\u003c\/strong\u003e The 8643 shell is shared with SAS hardware, but this assembly carries PCIe. It works from a motherboard, riser or PCIe switch port that exposes NVMe on 8643; it does \u003cstrong\u003enot\u003c\/strong\u003e work from an LSI RAID card or HBA, whose 8643 ports drive SAS lanes. We have tested that combination and the drive never enumerates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePowered from the PSU, not from the slot.\u003c\/strong\u003e U.2 SSDs need 3.3 V, 5 V and 12 V, and this cable brings all three in on a standard 15-pin SATA tail. Leave the tail off only when the drive is fed by a backplane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNothing to configure, nothing to flash.\u003c\/strong\u003e No switch, no re-driver, no firmware. Four lanes in, four lanes out, straight 1:1, which also means the drive behaves identically whether it is the only one in the box or one of twenty-four.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eConnector A\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eMiniSAS HD 4i, SFF-8643, 36-pin (host side)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eConnector B\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eU.2 \/ SFF-8639, 68-pin (drive side)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eSATA 15-pin tail — 3.3 V \/ 5 V \/ 12 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eLanes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e4 (PCIe x4, straight 1:1 mapping)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e75 cm end to end\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eSignal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003ePCIe 3.0 x4 native; PCIe 4.0 where host and routing allow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eProtocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eNVMe over PCIe — no SAS, no SATA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eB087TMZ99N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWorks with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e4U rackmount and tower chassis where the drive cage is far from the slot\u003c\/li\u003e\n\u003cli\u003eSFF-8643 ports on boards, risers and PCIe switch cards that carry PCIe lanes\u003c\/li\u003e\n\u003cli\u003e2.5″ U.2 NVMe SSDs (SFF-8639) of any vendor\u003c\/li\u003e\n\u003cli\u003eBuilds where the 50 cm cable was just too tight\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDoes not work with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLSI \/ Broadcom RAID cards and HBAs\u003c\/strong\u003e — SAS lanes in a 8643 shell, tested incompatible with U.2 drives\u003c\/li\u003e\n\u003cli\u003eSAS and SATA drives — the 68-pin end is PCIe-wired\u003c\/li\u003e\n\u003cli\u003eU.2 backplanes, which need two 8643 plugs rather than an 8639 plug\u003c\/li\u003e\n\u003cli\u003eCable chains: do not daisy-chain two of these to make 150 cm — passive PCIe does not tolerate that\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTypical deployments\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4U storage build, front cage to rear slot.\u003c\/strong\u003e The drive sits in a hot-swap bay at the front, the 8643 port is on a rear add-in card, and 75 cm is what it takes to route above the fan wall with slack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTower workstation with a full-length GPU.\u003c\/strong\u003e Graphics cards in the top slot push cable routing sideways; the extra length keeps the run off the card and away from the CPU cooler.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eU.2 drive on a bench test rig with the board at arm’s length.\u003c\/strong\u003e Enough length to move the drive between machines without unplugging anything.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is the difference between this and the 50 cm version?\u003c\/h3\u003e\n\u003cp\u003eLength only. Same connectors, same wiring, same SATA power tail, same 18-odd grams of cable. Choose by the routing distance in your chassis, not by the drive: if you are not sure, measure the path and add 10 cm of slack.\u003c\/p\u003e\n\u003ch3\u003eDoes it work with an LSI RAID card?\u003c\/h3\u003e\n\u003cp\u003eNo, and this is worth repeating because the connector fits either way. LSI RAID cards and HBAs put SAS lanes on their SFF-8643 ports; a U.2 SSD needs PCIe lanes. The drive will not appear. If you have a 94xx Tri-Mode controller, use our LSI94xx twin-U.2 cable, which is built for exactly that port.\u003c\/p\u003e\n\u003ch3\u003eCan I run PCIe 4.0 U.2 drives on it?\u003c\/h3\u003e\n\u003cp\u003eYes if the host port is Gen4. 75 cm is still within reach for Gen4 signalling, though a long passive run always has less margin than a short one — if the link trains at Gen3 on your board, that is the board and the length talking, not a fault. The drive works either way.\u003c\/p\u003e\n\u003ch3\u003eWhich end goes where?\u003c\/h3\u003e\n\u003cp\u003eThe 36-pin MiniSAS HD plug goes into the port on the board or card; the 68-pin U.2 plug goes into the drive. Both are keyed, so you cannot seat them backwards, but do check you are plugging into an 8643 port and not a neighbouring 8644 external port.\u003c\/p\u003e\n\u003ch3\u003eDo I need the SATA power tail?\u003c\/h3\u003e\n\u003cp\u003eFor a bare 2.5″ U.2 SSD, yes — it is the only power path. Connect it to any free SATA power lead. If the drive sits in a powered backplane, the tail stays unplugged.\u003c\/p\u003e\n\u003ch3\u003eWill longer cable slow the drive down?\u003c\/h3\u003e\n\u003cp\u003eNo. A passive cable either carries the link at the negotiated speed or fails to train; it does not quietly halve your throughput. Length affects signal margin at Gen4, which shows up as a generation step-down if anything, not as degraded performance.\u003c\/p\u003e\n\u003ch2\u003eIn the box\u003c\/h2\u003e\n\u003cul\u003e\u003cli\u003e1 × SFF-8643 to U.2 (SFF-8639) NVMe cable, 75 cm, with SATA power tail (SKU B087TMZ99N)\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eEvery cable is continuity- and pinout-tested before it ships and carries a 24-month warranty. If a link does not train, send us the controller model and the backplane part number before returning anything — in most cases the cable is the wrong variant for the port, not faulty, and we would rather tell you that up front.\u003c\/p\u003e\n\u003ch2\u003eRelated\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/dilinker-50cm-hd-mini-sassff-8643-to-u-2-sff-8639-nvme-ssd-cable\"\u003eSame cable in 50 cm, for compact chassis\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/minisas-hd-8x-to-2x-u-2-nvme-sff-8643-sff-8639-75cm\"\u003eLSI 94xx Tri-Mode controller? You need the dedicated twin-U.2 cable\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/u-2-nvmesff-8639\"\u003eAll U.2 \/ NVMe cables and adapters\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DiLinKer","offers":[{"title":"Default Title","offer_id":47981361365288,"sku":"B087TMZ99N","price":18.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0866\/1460\/6120\/files\/5-d.jpg?v=1712564522"},{"product_id":"diliving-pcie-to-nvme-u-2-adapter-pcie-4x-to-sff-8639-interface-for-2-5-nvme-ssdpex4sff8639","title":"DiLinKer PCIe x4 to U.2 NVMe Adapter Card, SFF-8639 68-Pin, Drive Mounts on the Card, Full-Profile Bracket","description":"\u003cp\u003eA PCIe x4 card with a \u003cstrong\u003eU.2 (SFF-8639)\u003c\/strong\u003e connector built into it, so a 2.5″ NVMe SSD mounts straight onto the card and hangs off the slot — no cable, no drive bay, no power lead. It is the shortest possible path from a PCIe slot to a U.2 drive, and it is the right part when the chassis has a free slot but no usable 2.5″ mounting point.\u003c\/p\u003e\n\u003ch2\u003eWhen the card wins over a cable\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo cable, therefore no cable fault.\u003c\/strong\u003e The 68-pin connector is soldered to the card and the card sits in the slot. There is nothing to route, nothing to strain, and none of the intermittent-drive problems that come from a cable being pulled tight around a drive cage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits chassis that have no free 2.5″ bay.\u003c\/strong\u003e Small form-factor builds and rebuilt OEM machines often have the slot but not the mounting point. The drive travels with the card, so the chassis layout stops mattering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSlot-powered, no PSU lead.\u003c\/strong\u003e The card draws from the slot’s 12 V and 3.3 V rails and passes them to the drive through the 68-pin connector. No SATA or Molex tail to find a home for.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull-profile bracket, standard height.\u003c\/strong\u003e Ships with a full-height bracket fitted, so it goes into a normal ATX or rackmount chassis without modification. The card is a plain x4 device — no bifurcation, no switch chip, no driver.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eHost interface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003ePCIe 3.0 x4 (backward compatible with PCIe 2.0 and 1.0)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eDrive interface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eU.2 \/ SFF-8639, 68-pin, onboard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eDrive form factor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e2.5″ NVMe SSD, mounted on the card\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eFrom the PCIe slot — no external power connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eBracket\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eFull-profile, fitted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eCabling required\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e3 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eB07YKQ2C93\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWorks with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAny x4, x8 or x16 PCIe slot on a desktop, workstation or server board\u003c\/li\u003e\n\u003cli\u003e2.5″ U.2 NVMe SSDs — all vendors, including Intel DC P3500 \/ P3600 \/ P3700, Samsung XS1715, OCZ Z-Drive 6000, HGST Ultrastar SN100\u003c\/li\u003e\n\u003cli\u003eChassis with clearance behind the card for a 2.5″ drive (roughly 7 mm plus the drive’s own thickness)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDoes not work with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSAS or SATA 2.5″ drives — the connector is PCIe-wired\u003c\/li\u003e\n\u003cli\u003eDrives that exceed the slot’s power budget; check the SSD datasheet for high-power enterprise models\u003c\/li\u003e\n\u003cli\u003eLow-profile-only chassis without swapping the bracket\u003c\/li\u003e\n\u003cli\u003ex1 slots — the drive needs four lanes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTypical deployments\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall workstation with one free slot and no 2.5″ bay.\u003c\/strong\u003e Drive on the card, card in the slot, done in one step.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReusing a server U.2 drive in a desktop.\u003c\/strong\u003e No backplane, no RAID card, no cable — the cheapest way to get an enterprise SSD into a consumer board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest bench with drives swapped constantly.\u003c\/strong\u003e The drive unplugs from the card in place, so you never touch the slot.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eDoes the drive really just sit on the card?\u003c\/h3\u003e\n\u003cp\u003eYes. The 2.5″ SSD plugs onto the onboard 68-pin connector and is supported by the card itself, so it is cantilevered off the slot. That is fine for a stationary machine; if the build gets moved around a lot, a cable-and-bay solution spreads the load better.\u003c\/p\u003e\n\u003ch3\u003eWill it fit next to my graphics card?\u003c\/h3\u003e\n\u003cp\u003eMeasure first. The drive adds roughly 7 mm of thickness plus its own height behind the card, and a full-length GPU in the adjacent slot can leave less room than you expect. Most ATX builds are fine; dense rack chassis often are not.\u003c\/p\u003e\n\u003ch3\u003eIs it PCIe 4.0?\u003c\/h3\u003e\n\u003cp\u003eNo — this card is PCIe 3.0 x4. A Gen4 drive will run at Gen3 speed on it, which is around 3.5 GB\/s rather than 6–7. For Gen4 you want our PCIe 4.0 to U.2 cable instead.\u003c\/p\u003e\n\u003ch3\u003eDo I need any driver or firmware?\u003c\/h3\u003e\n\u003cp\u003eNo. There is no switch chip and no bridge on the card; it is a passive electrical adapter, so the drive appears exactly as it would on a native U.2 port. NVMe support comes from the OS.\u003c\/p\u003e\n\u003ch3\u003eWhy does the listing say PCIe 1.0 compatible?\u003c\/h3\u003e\n\u003cp\u003eBecause the card is passive — it will run in an old slot at whatever that slot negotiates. In practice you would not put a U.2 NVMe drive behind a Gen1 link, but nothing breaks if you do.\u003c\/p\u003e\n\u003ch3\u003eDrive not detected — what should I check?\u003c\/h3\u003e\n\u003cp\u003eWhether the slot shares lanes with an M.2 socket or SATA ports (common on consumer boards), whether the drive is fully seated on the card, and whether the drive’s power draw fits the slot budget. If all three are fine, send us the board and SSD models.\u003c\/p\u003e\n\u003ch2\u003eIn the box\u003c\/h2\u003e\n\u003cul\u003e\u003cli\u003e1 × PCIe x4 to U.2 (SFF-8639) adapter card, full-profile bracket fitted (SKU B07YKQ2C93)\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eEvery cable is continuity- and pinout-tested before it ships and carries a 24-month warranty. If a link does not train, send us the controller model and the backplane part number before returning anything — in most cases the cable is the wrong variant for the port, not faulty, and we would rather tell you that up front.\u003c\/p\u003e\n\u003ch2\u003eRelated\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/diliving-pcie-4-0-x4-to-u-2-sff-8639-nvme-ssd-70cm-cable-no-additional-power-plug-required\"\u003ePrefer the drive in a bay? PCIe x4 to U.2 cable, 70cm\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/m-2-to-u-2-nvme-ssd-adapter-sff-8639-75cm\"\u003eM.2 slot instead of a PCIe slot? M.2 to U.2 adapter\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/u-2-nvmesff-8639\"\u003eAll U.2 \/ NVMe cables and adapters\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DiLinKer","offers":[{"title":"Default Title","offer_id":47981366608168,"sku":"B07YKQ2C93","price":18.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0866\/1460\/6120\/files\/4001.jpg?v=1713148641"},{"product_id":"dilinker-m-2-to-u-2-nvme-ssd-sff-8639-drive-to-m-2-host-adapter-u-2-ssd-converter-with-power-cable50cm","title":"DiLinKer U.2 NVMe SSD (SFF-8639) to M.2 Host Adapter, with SATA Power Cable, 50cm","description":"\u003cp\u003eYour board has no U.2 port, but it does have a spare \u003cstrong\u003eM.2\u003c\/strong\u003e slot. This adapter turns that slot into a \u003cstrong\u003eU.2 (SFF-8639)\u003c\/strong\u003e connection: a small card into the M.2 socket, a 50 cm cable out to the drive, and a SATA power lead from the PSU to feed it.\u003c\/p\u003e\n\u003ch2\u003eHow the direction works\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eU.2 drive, M.2 host — not the other way round.\u003c\/strong\u003e The card goes into the motherboard’s M.2 slot and the cable ends in a 68-pin SFF-8639 plug for a 2.5″ U.2 SSD. It does not convert an M.2 SSD into something you can drop into a U.2 bay; that is a different adapter and a different listing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe M.2 slot has to be PCIe, not SATA.\u003c\/strong\u003e An M-key slot with PCIe lanes works. A B-key slot that only carries SATA does not, and no amount of adapter will change that, because NVMe needs PCIe lanes to exist at all. Check the board manual for the slot’s lane assignment before ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe 12 V comes from your PSU.\u003c\/strong\u003e An M.2 slot supplies 3.3 V only. A 2.5″ U.2 drive wants 3.3 V, 5 V and 12 V, so the SATA power lead in the box is not optional — without it the drive will not spin up.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50 cm of slack for mounting.\u003c\/strong\u003e Long enough to sit the drive in a 2.5″ bay or on a bracket while the card stays in the slot. It is not long enough to route across a full tower — we stock a 75 cm PCIe 4.0 version for that.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eHost side\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eM.2 M-key (PCIe x4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eDrive side\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eU.2 \/ SFF-8639, 68-pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eSATA 15-pin lead to the PSU (12 V \/ 5 V \/ 3.3 V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eCable length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e50 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eProtocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eNVMe over PCIe — no SAS, no SATA drive support\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003ePart number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eRPC75-0025\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eUPC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e6970958102887\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eB07VB6L8SJ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWorks with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMotherboards whose M.2 slot carries PCIe lanes (M-key)\u003c\/li\u003e\n\u003cli\u003e2.5″ U.2 NVMe SSDs, any capacity or vendor\u003c\/li\u003e\n\u003cli\u003eDesktops, workstations and bench rigs with a free SATA power connector\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDoes not work with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eM.2 slots wired for SATA only (B-key) — NVMe needs PCIe\u003c\/li\u003e\n\u003cli\u003eConverting an M.2 SSD for use in a U.2 bay — that is the opposite direction\u003c\/li\u003e\n\u003cli\u003eSAS or SATA 2.5″ drives; the 68-pin end is wired for PCIe\u003c\/li\u003e\n\u003cli\u003eNotebooks and any chassis with no way to mount a 2.5″ drive\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTypical deployments\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorkstation with a spare M.2 slot.\u003c\/strong\u003e The cheapest way to add one U.2 drive when the board has no U.2 header and the PCIe slots are full.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBench and validation rigs.\u003c\/strong\u003e Swap U.2 drives between machines without opening a backplane or pulling a carrier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall form factor builds.\u003c\/strong\u003e An M.2 slot is often the only free host interface left; this turns it into something a 2.5″ enterprise drive can use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eDoes it need external power?\u003c\/h3\u003e\n\u003cp\u003eYes. The SATA power lead is required — a U.2 drive needs 12 V, and the M.2 slot does not supply it.\u003c\/p\u003e\n\u003ch3\u003eWill it work in an M.2 slot that only does SATA?\u003c\/h3\u003e\n\u003cp\u003eNo. The slot must provide PCIe lanes. If the manual lists the slot as SATA-only, pick a different slot.\u003c\/p\u003e\n\u003ch3\u003eCan I boot from the drive?\u003c\/h3\u003e\n\u003cp\u003eOnly if the board firmware can boot from NVMe on that slot. Many boards can; older ones list the drive in the OS but not in the boot menu.\u003c\/p\u003e\n\u003ch3\u003eIs it Gen3 or Gen4?\u003c\/h3\u003e\n\u003cp\u003eThe adapter itself is passive, so the link runs at whatever the slot and the drive negotiate. For a Gen4 build we stock a 75 cm PCIe 4.0 version.\u003c\/p\u003e\n\u003ch3\u003eWill a U.3 drive work on it?\u003c\/h3\u003e\n\u003cp\u003eDo not assume it will. U.3 drives use a different pin assignment on the same 68-pin shell. Send us the drive model before ordering and we will confirm.\u003c\/p\u003e\n\u003ch3\u003eCan I use the M.2 slot for something else at the same time?\u003c\/h3\u003e\n\u003cp\u003eNo — the card occupies the slot. If you need both, look at a PCIe x4 to U.2 cable instead, which leaves every M.2 slot free.\u003c\/p\u003e\n\u003ch2\u003eIn the box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × U.2 (SFF-8639) to M.2 host adapter card\u003c\/li\u003e\n\u003cli\u003e1 × 50 cm cable\u003c\/li\u003e\n\u003cli\u003e1 × SATA power lead\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEvery cable is continuity- and pinout-tested before it ships and carries a 24-month warranty. If a link does not train, send us the controller model and the backplane part number before returning anything — in most cases the cable is the wrong variant for the port, not faulty, and we would rather tell you that up front.\u003c\/p\u003e\n\u003ch2\u003eRelated\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/m-2-to-u-2-nvme-ssd-adapter-sff-8639-75cm\"\u003eSame adapter, PCIe 4.0 and 75cm\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/diliving-pcie-4-0-x4-to-u-2-sff-8639-nvme-ssd-70cm-cable-no-additional-power-plug-required\"\u003ePCIe x4 slot to U.2 cable — no M.2 slot used\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/u-2-nvmesff-8639\"\u003eAll U.2 NVMe cables and adapters\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DiLinKer","offers":[{"title":"Default Title","offer_id":47981367263528,"sku":"B07VB6L8SJ","price":28.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0866\/1460\/6120\/files\/2-2.jpg?v=1712569102"},{"product_id":"oculink-4x-to-u-2-nvme-cable-with-power-100cm","title":"DiLinKer oCuLink 4X to NVMe U.2 SSD, SFF-8611 to SFF-8639 Cable with Power 100cm(CBL-SAST-0956)","description":"\u003cp\u003ePut a U.2 NVMe drive on an OCuLink port. This DiLinKer assembly (CBL-SAST-0956) connects an OCuLink 4x host connector (SFF-8611, 36-pin) to a U.2 device connector (SFF-8639, 68-pin) and includes a 4-pin power lead, because a U.2 drive needs 12 V as well as the PCIe link. It is the straightforward way to hang enterprise NVMe storage off NAS boards, industrial platforms and M.2-to-OCuLink adapters.\u003c\/p\u003e\n\u003ch2\u003eWhy this cable\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive-side power included.\u003c\/strong\u003e The 4-pin lead feeds 12 V to the U.2 connector, so the drive runs without a backplane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour PCIe lanes, straight through.\u003c\/strong\u003e A U.2 drive is a 4-lane device — this cable gives it all four lanes from the host.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt for PCIe 3.0 \/ 4.0 x4 links.\u003c\/strong\u003e About 3.9 GB\/s at Gen3 x4 and 7.9 GB\/s at Gen4 x4, per port.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 cm reach.\u003c\/strong\u003e From a controller card or board header to a drive bay without strain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePassive assembly.\u003c\/strong\u003e No switch chip — the drive appears directly on the host PCIe bus.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;font-size:14px;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eHost connector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eOCuLink 4x, SFF-8611, 36-pin plug\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eDevice connector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eU.2 (SFF-8639), 68-pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eLanes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e4 (x4), straight 1:1 mapping\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eInterface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003ePCIe x4 (Gen3 \/ Gen4 deployments)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e4-pin lead from the system PSU to the drive connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eProtocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eNVMe over PCIe only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e100 cm \/ 39.4 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003ePart number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eCBL-SAST-0956\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eSKU \/ EAN\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eB07NY4S5CS \/ 6970958108629\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e24 months\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWorks with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBoards and NAS platforms with OCuLink 4x ports.\u003c\/li\u003e\n\u003cli\u003eM.2 to OCuLink adapter cards on desktop and workstation boards.\u003c\/li\u003e\n\u003cli\u003eU.2 NVMe SSDs such as Samsung PM9A3, Micron 7450, Kioxia CM6 and Intel P4510 series.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDoes not work with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSAS or SATA drives. The link carries PCIe only, so the device must be NVMe.\u003c\/li\u003e\n\u003cli\u003eSlimSAS (SFF-8654) hosts — different connector standard.\u003c\/li\u003e\n\u003cli\u003ePCIe 5.0 links. Plan on Gen3\/Gen4 operation for this assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTypical deployments\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNAS with a U.2 tier.\u003c\/strong\u003e OCuLink ports on a storage board driving enterprise NVMe drives.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesktop NVMe expansion.\u003c\/strong\u003e An M.2 to OCuLink adapter plus this cable adds a U.2 drive without a PCIe slot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest benches.\u003c\/strong\u003e Swap U.2 drives between systems without a backplane.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eMy board has no OCuLink port — can I still use it?\u003c\/h3\u003e\n\u003cp\u003eYes, with an M.2 to OCuLink adapter card in a spare M.2 slot. The adapter presents an OCuLink port; this cable then carries the link and power to the U.2 drive.\u003c\/p\u003e\n\u003ch3\u003eWhy does the cable need a power lead?\u003c\/h3\u003e\n\u003cp\u003eU.2 drives take their 12 V supply through the SFF-8639 connector. Without power the drive will not spin up even though the PCIe link is fine. Connect the 4-pin lead to a PSU output once and you are done.\u003c\/p\u003e\n\u003ch3\u003eWhat speed will I get?\u003c\/h3\u003e\n\u003cp\u003eA Gen3 x4 link moves about 3.9 GB\/s and Gen4 x4 about 7.9 GB\/s — in both cases faster than the drive itself can sustain, so the cable is not the bottleneck.\u003c\/p\u003e\n\u003ch3\u003eCan I connect SATA drives?\u003c\/h3\u003e\n\u003cp\u003eNo. OCuLink carries PCIe only. SATA drives need a SATA controller and standard SATA cables.\u003c\/p\u003e\n\u003ch2\u003eIn the box\u003c\/h2\u003e\n\u003cul\u003e\u003cli\u003e1 × OCuLink 4x to U.2 cable with power lead, 100 cm (CBL-SAST-0956)\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eBacked by a 24-month warranty. If a link trains at reduced width or does not appear, contact us with your controller and device models and we will help you isolate the cause.\u003c\/p\u003e\n\u003ch2\u003eRelated\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/diliving.com\/collections\/oculinksff-8611\"\u003eAll OCuLink (SFF-8611) cables\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/diliving.com\/collections\/u-2-nvmesff-8639\"\u003eU.2 NVMe (SFF-8639) cables and adapters\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DiLinKer","offers":[{"title":"Default Title","offer_id":47981369360680,"sku":"B07NY4S5CS","price":18.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0866\/1460\/6120\/files\/1111.jpg?v=1712826699"},{"product_id":"minisas-hd-8x-to-2x-u-2-nvme-sff-8643-sff-8639-75cm","title":"DiLinKer LSI 94xx Tri-Mode Cable, 2x U.2 NVMe (SFF-8639) from One SFF-8643 Port, 75cm, with Power","description":"\u003cp\u003eA two-headed U.2 cable for \u003cstrong\u003eLSI 94xx Tri-Mode\u003c\/strong\u003e controllers. One 36-pin SFF-8643 port on the card fans out to two \u003cstrong\u003e68-pin SFF-8639\u003c\/strong\u003e drive connectors, 75 cm each, with power tails. Both heads carry NVMe over PCIe, which is only possible because the 94xx family can put PCIe lanes on its 8643 ports — on any other LSI card the same port speaks SAS and this cable does nothing.\u003c\/p\u003e\n\u003ch2\u003eWhy this cable is controller-specific\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOnly Tri-Mode controllers put PCIe on an 8643 port.\u003c\/strong\u003e Across the LSI range the SFF-8643 shell is used for SAS lanes. The 94xx generation is the one that can drive NVMe over those same pins, which is why this assembly is sold as an LSI94xx part and not as a generic U.2 cable. On a SAS-only HBA the drives simply will not appear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo drives from one port, with the lanes split in the card.\u003c\/strong\u003e The split happens inside the controller, not in the cable, which is why nothing here needs power, firmware or a switch chip. Each head still presents a full x4 link to its drive.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower tails on both heads.\u003c\/strong\u003e Each 2.5″ U.2 SSD needs 3.3 V, 5 V and 12 V, and each head carries its own 4-pin power lead for exactly that. Drives in a powered backplane can leave them unplugged; bare drives cannot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75 cm per head, correct on this listing.\u003c\/strong\u003e The old description on this page said 50 cm in one line and 75 cm in another. The part we ship is 75 cm end to end on each head — treat the 50 cm line as a typo, and measure your routing against 75.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eHost connector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eMiniSAS HD 4i, SFF-8643, 36-pin (one)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eDrive connectors\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eU.2 \/ SFF-8639, 68-pin (two)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e4-pin power tail on each drive head\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eLanes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003ePCIe x4 to each drive (lane split handled by the controller)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e75 cm per head, end to end\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eController support\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eLSI \/ Broadcom 94xx Tri-Mode series only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eProtocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eNVMe over PCIe — not SAS, not SATA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eCross-reference\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eBroadcom 05-50065-00 \/ 05-50064-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eB07JM1H18S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWorks with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLSI \/ Broadcom 94xx Tri-Mode controllers with SFF-8643 ports (check your card’s port configuration before ordering)\u003c\/li\u003e\n\u003cli\u003e2.5″ U.2 NVMe SSDs (SFF-8639), any vendor\u003c\/li\u003e\n\u003cli\u003eChassis with room for two drives within 75 cm of the card\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDoes not work with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAny SAS-only HBA or RAID card, including earlier LSI generations — their 8643 ports carry SAS lanes and the drives will not enumerate\u003c\/li\u003e\n\u003cli\u003eSAS or SATA drives — both heads are PCIe-wired\u003c\/li\u003e\n\u003cli\u003eMotherboard 8643 ports — those are single-link; use our plain SFF-8643 to U.2 cable instead\u003c\/li\u003e\n\u003cli\u003eSplitting one head to two drives: each head is one drive, full stop\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTypical deployments\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo-drive NVMe mirror on a 94xx card.\u003c\/strong\u003e One cable, two SSDs, no backplane and no expander — the cheapest way to get redundant NVMe into a workstation-class build.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest bench with a Tri-Mode card and loose drives.\u003c\/strong\u003e Both drives sit on the bench next to the card instead of in a cage, so you can swap them without pulling the chassis apart.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall server where a U.2 backplane will not fit.\u003c\/strong\u003e Two cabled drives in a 2U chassis take less depth than a backplane plus its cabling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eIs this the same as a normal SFF-8643 to U.2 cable?\u003c\/h3\u003e\n\u003cp\u003eNo. A normal one carries a single drive from a single-link port. This one carries two drives from one port, and only works because the 94xx controller splits the lanes internally. Buy this for a 94xx card; buy the plain cable for a motherboard or riser port.\u003c\/p\u003e\n\u003ch3\u003eWhich controllers is it actually for?\u003c\/h3\u003e\n\u003cp\u003eThe LSI \/ Broadcom 94xx Tri-Mode family, where the SFF-8643 ports can be configured for NVMe. Because port configuration is a card-level setting, send us your exact model if you are not certain — we would rather confirm than have you return a cable.\u003c\/p\u003e\n\u003ch3\u003eThe listing says 50 cm in one place and 75 cm in another.\u003c\/h3\u003e\n\u003cp\u003eThe part is 75 cm per head. The 50 cm line came from an earlier description and has been removed; if you need a measured length before ordering, ask and we will put a tape on one.\u003c\/p\u003e\n\u003ch3\u003eDo both power tails have to be connected?\u003c\/h3\u003e\n\u003cp\u003eConnect the tail for every drive you actually fit. Each 4-pin tail feeds one 2.5″ U.2 SSD with 3.3 V, 5 V and 12 V; a drive with no power tail will not spin up, and there is nothing on the cable that substitutes for it.\u003c\/p\u003e\n\u003ch3\u003eCan I use it on a plain SAS HBA to get two drives?\u003c\/h3\u003e\n\u003cp\u003eNo, and this is the mistake that costs people a return. A SAS HBA puts SAS lanes on its 8643 ports, so NVMe drives never enumerate regardless of cabling. For SAS or SATA drives on an HBA you want a 4x SATA breakout cable, not this.\u003c\/p\u003e\n\u003ch3\u003eHow fast does each drive run?\u003c\/h3\u003e\n\u003cp\u003eWhatever the card gives it: each head presents four PCIe lanes to its drive. We do not quote a single GB\/s figure on this page because the number depends entirely on the controller generation and the drive, and a made-up headline number helps nobody.\u003c\/p\u003e\n\u003ch2\u003eIn the box\u003c\/h2\u003e\n\u003cul\u003e\u003cli\u003e1 × LSI 94xx twin U.2 NVMe cable, SFF-8643 to 2× SFF-8639, 75 cm per head, with 4-pin power tails (SKU B07JM1H18S)\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eEvery cable is continuity- and pinout-tested before it ships and carries a 24-month warranty. If a link does not train, send us the controller model and the backplane part number before returning anything — in most cases the cable is the wrong variant for the port, not faulty, and we would rather tell you that up front.\u003c\/p\u003e\n\u003ch2\u003eRelated\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/dilinker-75cm-hd-mini-sassff-8643-to-u-2-sff-8639-nvme-ssd-cable\"\u003eSingle-drive SFF-8643 to U.2 cable, 75 cm\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/diliving-pcie-4-0-x4-to-u-2-sff-8639-nvme-ssd-70cm-cable-no-additional-power-plug-required\"\u003ePCIe 4.0 x4 to U.2 cable, no extra power needed\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/u-2-nvmesff-8639\"\u003eAll U.2 \/ NVMe cables and adapters\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DiLinKer","offers":[{"title":"Default Title","offer_id":47981369917736,"sku":"B07JM1H18S","price":35.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0866\/1460\/6120\/files\/11-1.jpg?v=1712632966"},{"product_id":"dilinker-50cm-hd-mini-sassff-8643-to-u-2-sff-8639-nvme-ssd-cable","title":"DiLinKer MiniSAS HD (SFF-8643) to U.2 NVMe Cable, SFF-8639 68-Pin, 50cm, with SATA Power","description":"\u003cp\u003eA four-lane PCIe cable that takes the \u003cstrong\u003eSFF-8643\u003c\/strong\u003e port on your board or add-in card and turns it into a \u003cstrong\u003eU.2 (SFF-8639)\u003c\/strong\u003e drive connector, 50 cm away, with a SATA power tail to feed the drive. It carries PCIe lanes only — the physical connector is the same one SAS uses, but the wiring inside is not, and that distinction is the whole reason this page exists.\u003c\/p\u003e\n\u003ch2\u003eWhat this cable actually does\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIt moves PCIe lanes, not SAS.\u003c\/strong\u003e SFF-8643 is a shell, not a protocol. On a motherboard, a riser or a PCIe switch card the four lanes behind that shell are PCIe; on an LSI RAID card or HBA they are SAS. This assembly is wired for the first case. Plug it into the second and the drive simply never appears — no error, no warning, no drive letter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe SATA tail is not optional in most builds.\u003c\/strong\u003e U.2 drives draw 3.3 V, 5 V and 12 V, and a 2.5″ U.2 SSD has no other power input. The 15-pin SATA tail on this cable is what feeds it. Chassis that supply power through a U.2 backplane do not need it, which is why the connector is there but detachable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50 cm is the short option.\u003c\/strong\u003e This length is for builds where the drive cage sits close to the slot: 1U and 2U chassis, M.2-to-U.2 riser cards, and tower builds with the SSD in a bay next to the board. If your routing has to travel — front cage to a rear slot, or around a full-length GPU — take the 75 cm version instead of stretching this one.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour lanes, straight through.\u003c\/strong\u003e Lane 0 to lane 0 and so on, no split, no re-driver, nothing to configure. A Gen3 x4 link gives you roughly 3.9 GB\/s of usable bandwidth, which is the ceiling for any single U.2 drive on this cable; the drive model does not change that number.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eConnector A\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eMiniSAS HD 4i, SFF-8643, 36-pin (plugs into the host port)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eConnector B\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eU.2 \/ SFF-8639, 68-pin (plugs into the SSD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eSATA 15-pin tail — 3.3 V \/ 5 V \/ 12 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eLanes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e4 (PCIe x4, straight 1:1 mapping)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003e50 cm end to end\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eSignal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003ePCIe 3.0 x4 native; PCIe 4.0 where the host port and routing allow it\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eProtocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eNVMe over PCIe — no SAS, no SATA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px;background:#f7f8fa;width:34%\"\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #e3e6ea;padding:7px 10px\"\u003eB07JH92TD9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWorks with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSFF-8643 ports on a motherboard, riser card or PCIe switch card that carry PCIe lanes\u003c\/li\u003e\n\u003cli\u003eM.2-to-U.2 add-in cards that expose an SFF-8643 output\u003c\/li\u003e\n\u003cli\u003e2.5″ U.2 NVMe SSDs (SFF-8639), any capacity or vendor\u003c\/li\u003e\n\u003cli\u003eGen3 and Gen4 platforms — the link negotiates to whatever both ends support\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDoes not work with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLSI \/ Broadcom RAID controllers and HBAs.\u003c\/strong\u003e Their SFF-8643 ports carry SAS lanes. A U.2 SSD will not enumerate through this cable on those cards, and we have tested it — please do not buy this for a RAID card.\u003c\/li\u003e\n\u003cli\u003eSAS or SATA drives — the 68-pin end is wired for PCIe, not for SAS signalling\u003c\/li\u003e\n\u003cli\u003eU.2 backplanes: those present a socket, so you need a cable with two SFF-8643 plugs instead\u003c\/li\u003e\n\u003cli\u003eAnything expecting a 12 Gb\/s SAS link — this is not that cable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTypical deployments\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorkstation with an M.2 slot and no free PCIe slot.\u003c\/strong\u003e An M.2-to-U.2 riser converts the M.2 slot into an SFF-8643 output; this cable carries it the last 50 cm to a 2.5″ U.2 drive mounted in a bay.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eServer board with an onboard 8643 wired for NVMe.\u003c\/strong\u003e Some boards expose NVMe on SFF-8643 rather than on OCuLink or MCIO. Same cable, drive goes straight into the cage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBench and test rigs.\u003c\/strong\u003e Short, light and easy to re-route when you are swapping drives all day — the 50 cm length stays out of the way on an open frame.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eWill this work with my LSI RAID card?\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eNo.\u003c\/strong\u003e This is the single most common mistake with SFF-8643 cables, so it is worth being blunt: the connector fits, the drive does not appear. LSI RAID cards and HBAs drive SAS lanes through their 8643 ports, while a U.2 SSD needs PCIe lanes with NVMe on top. We have tested this combination and it is completely incompatible. If your card is a 94xx series Tri-Mode controller, the cable you want is our LSI94xx-specific twin-U.2 assembly instead.\u003c\/p\u003e\n\u003ch3\u003eDo I have to connect the SATA power tail?\u003c\/h3\u003e\n\u003cp\u003eYes for a bare 2.5″ U.2 drive — it has no other power input. Leave it unplugged only when the drive is already powered by a backplane or a powered cage. The tail carries 3.3 V, 5 V and 12 V, so a standard SATA power lead from the PSU is enough.\u003c\/p\u003e\n\u003ch3\u003eWill it run at PCIe 4.0?\u003c\/h3\u003e\n\u003cp\u003eThe cable is built for it and 50 cm is a comfortable length for Gen4, but the link is only as fast as the slowest part of the chain: a Gen3 slot or a Gen3 drive pins you at Gen3 speeds. Nothing breaks if the link trains one generation lower — you lose bandwidth, not the drive.\u003c\/p\u003e\n\u003ch3\u003eIs 50 cm long enough for my chassis?\u003c\/h3\u003e\n\u003cp\u003eMeasure the actual path, not the straight-line distance: from the port, around the drive cage, to where the SSD sits. If the answer is over about 40 cm of real routing, take the 75 cm version — pulling a short cable tight puts load on the 68-pin connector and that is where intermittent drives come from.\u003c\/p\u003e\n\u003ch3\u003eCan I use two of these to reach two drives?\u003c\/h3\u003e\n\u003cp\u003eOne cable, one drive. Each U.2 SSD needs its own four lanes and its own 68-pin connector, so two drives means two cables and two host ports. If your controller only has one 8643 port, look at a PCIe switch card or a U.2 backplane rather than trying to split this cable.\u003c\/p\u003e\n\u003ch3\u003eThe drive powers up but is not detected — what now?\u003c\/h3\u003e\n\u003cp\u003eCheck three things in this order: the port really carries PCIe (not SAS), the drive is seated fully in the 68-pin connector, and the SATA tail is on a live rail. If all three are fine, send us the controller or board model and the SSD model before returning anything — in our experience it is the port type far more often than the cable.\u003c\/p\u003e\n\u003ch2\u003eIn the box\u003c\/h2\u003e\n\u003cul\u003e\u003cli\u003e1 × SFF-8643 to U.2 (SFF-8639) NVMe cable, 50 cm, with SATA power tail (SKU B07JH92TD9)\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eEvery cable is continuity- and pinout-tested before it ships and carries a 24-month warranty. If a link does not train, send us the controller model and the backplane part number before returning anything — in most cases the cable is the wrong variant for the port, not faulty, and we would rather tell you that up front.\u003c\/p\u003e\n\u003ch2\u003eRelated\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/dilinker-75cm-hd-mini-sassff-8643-to-u-2-sff-8639-nvme-ssd-cable\"\u003eSame cable in 75 cm, for longer chassis routing\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/m-2-to-u-2-nvme-ssd-adapter-sff-8639-75cm\"\u003eNeed the 8643 port in the first place? M.2 to U.2 adapter\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/u-2-nvmesff-8639\"\u003eAll U.2 \/ NVMe cables and adapters\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DiLinKer","offers":[{"title":"Default Title","offer_id":47981371392296,"sku":"B07JH92TD9","price":18.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0866\/1460\/6120\/files\/41XabKi9mqL.jpg?v=1712028408"},{"product_id":"mcio-x8-to-2x-u-2-nvme-adapter-sff-ta-1016-gen5-80cm","title":"DiLinKer MCIO x8 to 2*U.2 NVMe Adapter, SFF-TA-1016 74Pin to 2*SFF-8639 68Pin, PCIe Gen5 Mini Cooledge IO Cable with Power, 80cm","description":"\u003cp\u003e\u003cstrong\u003eOne MCIO port, two U.2 drives.\u003c\/strong\u003e The DiLinKer RMC74-8986-AX1 is an 80 cm internal PCIe 5.0 cable that splits a single MCIO 8x host connector (SFF-TA-1016, 74-pin) into two independent U.2 NVMe device connectors (SFF-8639, 68-pin). The eight host lanes are broken out as two full x4 links, so each drive trains at its own width and generation — a PCIe 5.0 drive reaches its rated throughput on one port while a PCIe 4.0 drive runs at Gen4 on the other, with no PCIe switch card, no riser and no driver to install.\u003c\/p\u003e\n\n\u003ch2\u003eWhy this adapter cable\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8 lanes in, 2 × x4 out.\u003c\/strong\u003e Each U.2 bay gets a dedicated PCIe x4 link instead of sharing bandwidth through a bridge chip.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePCIe 5.0 rated, 32 GT\/s per lane.\u003c\/strong\u003e Up to roughly 15.75 GB\/s per port. Fully backward compatible with PCIe 4.0 and PCIe 3.0 hosts and drives, so it also works on older platforms.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower is carried in the assembly.\u003c\/strong\u003e The U.2 side receives 12 V through the integrated power lead, so drives run without a backplane or a separate SATA power run.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt to the SFF pinouts.\u003c\/strong\u003e Host side SFF-TA-1016 74-pin, device side SFF-8639 68-pin — the two connector standards the drives and boards are actually specified against.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e80 cm of reach.\u003c\/strong\u003e Long enough to route from a mid-board MCIO header to a rear drive cage in 1U and 2U chassis without strain on the connector.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePassive and firmware-free.\u003c\/strong\u003e No retimer, no power-sequencing logic, no BIOS or OS setting specific to the cable itself.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;font-size:14px;\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eHost connector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eMCIO 8x, SFF-TA-1016, 74-pin\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;\"\u003e\u003cstrong\u003eDevice connectors\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e2 × U.2 (SFF-8639), 68-pin\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;\"\u003e\u003cstrong\u003eLane configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e8 host lanes → 2 × 4 device lanes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;\"\u003e\u003cstrong\u003ePCIe generation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003ePCIe 5.0 (32 GT\/s per lane); backward compatible with 4.0 \/ 3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;\"\u003e\u003cstrong\u003eBandwidth per port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eUp to 128 GT\/s (about 15.75 GB\/s at Gen5 x4)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;\"\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e80 cm \/ 31.5 in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eIntegrated power lead from the system PSU\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;\"\u003e\u003cstrong\u003eProtocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eNVMe over PCIe only — does not carry SAS or SATA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;\"\u003e\u003cstrong\u003ePart number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eRMC74-8986-AX1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;\"\u003e\u003cstrong\u003eSKU \/ EAN\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eB0CCV4PXV8 \/ 6970958109732\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;\"\u003e\u003cstrong\u003eNet weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e104 g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;\"\u003e\u003cstrong\u003eOperating temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e0 – 70 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;\"\u003e\u003cstrong\u003eCompliance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eSFF-TA-1016, SFF-8639, RoHS\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e24 months\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWorks with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eServer and workstation boards that expose an MCIO 8x (SFF-TA-1016 74-pin) port — common on PCIe 5.0 platforms from Supermicro, ASUS, ASRock Rack, Gigabyte, Tyan, and on AMD EPYC and Intel Xeon Scalable reference designs.\u003c\/li\u003e\n  \u003cli\u003eU.2 NVMe SSDs such as Samsung PM9A3 \/ PM1733 \/ PM1743, Micron 7450 \/ 9300, Kioxia CM6 \/ CD6, Solidigm D7-P5510 \/ D5-P5316 and Intel P4510 \/ P5520 series.\u003c\/li\u003e\n  \u003cli\u003eU.2 drive cages and hot-swap bays that terminate in SFF-8639.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDoes not work with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSlimSAS (SFF-8654) or MiniSAS HD (SFF-8643) hosts — those need a different cable in this range, not an adapter on this one.\u003c\/li\u003e\n  \u003cli\u003eSAS or SATA drives. The MCIO host port carries PCIe lanes only.\u003c\/li\u003e\n  \u003cli\u003eOEM systems that re-purpose the MCIO connector with a proprietary pinout (some Dell, HPE and Lenovo chassis). Check the board manual, or message us with your model before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTypical deployments\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBoot and log tier.\u003c\/strong\u003e Two U.2 drives in mirror from a single MCIO port, leaving the other ports free for data drives.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAI and HPC nodes.\u003c\/strong\u003e Gen5 U.2 for dataset staging where the drive, not the cable, is the bottleneck.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1U \/ 2U chassis with rear cages.\u003c\/strong\u003e The 80 cm run reaches the back of the case without a mid-board backplane.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorkstations building a ZFS or Storage Spaces pool.\u003c\/strong\u003e Two NVMe devices without spending a PCIe slot on a quad M.2 or U.2 card.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhich MCIO breakout cable do you need?\u003c\/h2\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;font-size:14px;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth style=\"border:1px solid #ddd;padding:8px 10px;background:#f2f2ef;text-align:left;\"\u003eHost port\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ddd;padding:8px 10px;background:#f2f2ef;text-align:left;\"\u003eDevice side\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ddd;padding:8px 10px;background:#f2f2ef;text-align:left;\"\u003eUse when\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eMCIO 8x\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e2 × U.2 (SFF-8639)\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e\n\u003cstrong\u003eThis product\u003c\/strong\u003e — direct-attach NVMe drives or a U.2 cage\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eMCIO 8x\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e2 × MiniSAS HD (SFF-8643)\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eYou already own an SFF-8643 backplane or U.2 adapter (\u003ca href=\"https:\/\/diliving.com\/products\/mcio-x8-to-2x-minisas-hd-sff-ta-1016-sff-8643-gen4-80cm\"\u003eGen4 version\u003c\/a\u003e)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eMCIO 8x\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e1 × SlimSAS 8x (SFF-8654)\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eBoard-to-board link to a SlimSAS backplane (\u003ca href=\"https:\/\/diliving.com\/collections\/slimsassff-8654\"\u003eSlimSAS cables\u003c\/a\u003e)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eSlimSAS 8x\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e2 × U.2 (SFF-8639)\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eYour board has SlimSAS headers rather than MCIO (\u003ca href=\"https:\/\/diliving.com\/collections\/u-2-nvmesff-8639\"\u003eU.2 cables\u003c\/a\u003e)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\n\u003ch3\u003eDoes this cable work on a PCIe 4.0 motherboard?\u003c\/h3\u003e\n\u003cp\u003eYes. The cable is passive, so the link speed is negotiated between the host and the drive. A Gen4 board with Gen4 drives trains at 16 GT\/s; a Gen5 drive on a Gen4 board simply runs at Gen4. Nothing needs to be configured.\u003c\/p\u003e\n\n\u003ch3\u003eDo I have to enable PCIe bifurcation?\u003c\/h3\u003e\n\u003cp\u003eIt depends on how your board wires the MCIO port. Many server boards ship the MCIO 8x header already configured as 2 × x4, or drive it from a PCIe switch, in which case there is nothing to change. If your board exposes that header as a single x8 root port, enable x4x4 bifurcation for that port in the BIOS. The board manual will state which case applies.\u003c\/p\u003e\n\n\u003ch3\u003eDo the U.2 drives need their own power cable?\u003c\/h3\u003e\n\u003cp\u003eNo separate SATA or Molex run to each drive — power is delivered through the integrated lead in this assembly. You connect that lead to the system PSU once, and both U.2 connectors are powered from it.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is the difference between MCIO and SlimSAS?\u003c\/h3\u003e\n\u003cp\u003eBoth are compact internal PCIe connectors with 8-lane (74-pin) variants, but they are different standards with different housings and latches, and they are not interchangeable. MCIO is SFF-TA-1016 and is the connector most PCIe 5.0 server boards use for NVMe breakout. SlimSAS is SFF-8654 and is also used for SAS 4.0. If you are unsure which one is on your board, send us a photo of the header and we will confirm.\u003c\/p\u003e\n\n\u003ch3\u003eCan I connect SAS or SATA drives to this cable?\u003c\/h3\u003e\n\u003cp\u003eNo. The MCIO 8x port carries PCIe lanes only, so the device side must be a U.2 NVMe drive or a U.2 NVMe backplane. For SAS drives, use a SlimSAS to SAS fan-out cable instead.\u003c\/p\u003e\n\n\u003ch3\u003eWill it work in a Dell, HPE or Lenovo server?\u003c\/h3\u003e\n\u003cp\u003eOften not, unless the system uses the standard SFF-TA-1016 pinout. Several OEMs re-purpose the same physical connector with a proprietary lane order, and a standard cable will either not link or will link at reduced width. Tell us the exact model before ordering and we will check it against our pinout notes.\u003c\/p\u003e\n\n\u003ch3\u003eIs 80 cm too long for PCIe 5.0?\u003c\/h3\u003e\n\u003cp\u003eAt 32 GT\/s every centimetre adds insertion loss, so keep the run as short as your chassis allows and avoid tight bends or sharp folds. 80 cm is intended for in-chassis routing to a rear cage. If a link trains below Gen5, cable length and routing are the first things to check.\u003c\/p\u003e\n\n\u003ch2\u003eIn the box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × MCIO 8x to 2 × U.2 NVMe adapter cable, 80 cm (RMC74-8986-AX1)\u003c\/li\u003e\n  \u003cli\u003eIntegrated power lead\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBacked by a 24-month warranty. If a cable arrives damaged or fails to link, contact us with your board model and we will replace it or help you trace the fault.\u003c\/p\u003e\n\n\u003ch2\u003eRelated\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/diliving.com\/collections\/mini-cooledge-iomcio\"\u003eAll MCIO \/ Mini Cool Edge IO cables\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/diliving.com\/collections\/u-2-nvmesff-8639\"\u003eU.2 NVMe (SFF-8639) cables and adapters\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/diliving.com\/products\/mcio-x8-to-2x-minisas-hd-sff-ta-1016-sff-8643-gen4-80cm\"\u003eMCIO x8 to 2× MiniSAS HD, PCIe Gen4, 80 cm\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"DiLinKer","offers":[{"title":"Default Title","offer_id":48720580313384,"sku":"B0CCV4PXV8","price":38.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0866\/1460\/6120\/files\/1-1.jpg?v=1712645847"},{"product_id":"mcio-x4-to-u-2-nvme-adapter-sff-ta-1016-sff-8639-70cm","title":"DiLinKer PCIe 5.0 MCIO x4 to U.2 NVMe Adapter, SFF-TA-1016 to SFF-8639 Cable with Power, Cable 70cm","description":"\u003cp\u003eAttach a U.2 (SFF-8639) NVMe drive directly to an MCIO header. This PCIe 5.0 assembly starts with an MCIO 4x connector (SFF-TA-1016, 38-pin) and ends in a U.2 drive interface, with a power branch built into the cable so one part does the whole job. It is the shortest path from a Gen5 board’s MCIO x4 headers to 2.5-inch U.2 NVMe SSDs — no adapter card, no backplane.\u003c\/p\u003e\n\u003ch2\u003eWhy this cable\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePCIe 5.0 rated.\u003c\/strong\u003e A full x4 link at 32 GT\/s per lane — about 15.75 GB\/s to a Gen5 U.2 SSD.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect drive attach.\u003c\/strong\u003e Reaches the U.2 drive itself; no backplane or adapter card in between.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower built into the assembly.\u003c\/strong\u003e The cable carries the drive power branch, so you do not need a separate U.2 power adapter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e70 cm of reach.\u003c\/strong\u003e Comfortable routing from board headers to a 2.5-inch drive bay.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePassive assembly.\u003c\/strong\u003e No firmware, no driver, nothing to configure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;font-size:14px;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eHost connector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eMCIO 4x, SFF-TA-1016, 38-pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eDevice interface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eU.2 NVMe, SFF-8639\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eIntegrated power branch for the drive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eLane configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e4 lanes, 1:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eInterface speed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003ePCIe 5.0, up to 32 GT\/s per lane\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e70 cm \/ 27.6 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eSKU \/ identifier\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003eSR-0549-AX1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;background:#fafafa;width:38%;\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px 10px;\"\u003e24 months\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWorks with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBoards with MCIO 4x (SFF-TA-1016) 38-pin headers carrying PCIe.\u003c\/li\u003e\n\u003cli\u003e2.5-inch U.2 (SFF-8639) NVMe SSDs, Gen4 and Gen5.\u003c\/li\u003e\n\u003cli\u003eServer and workstation chassis with standard drive power (SATA-style or MOLEX via the branch).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDoes not work with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eU.2 drives behind a backplane — for that, run an MCIO cable to the backplane port instead.\u003c\/li\u003e\n\u003cli\u003eM.2 slots — this is a U.2 (2.5-inch) assembly.\u003c\/li\u003e\n\u003cli\u003eSAS\/SATA U.2 drives behind SAS hosts — NVMe requires a PCIe-capable host port.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTypical deployments\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGen5 board to U.2 SSD.\u003c\/strong\u003e The direct MCIO-to-drive run on current platforms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFront bay NVMe.\u003c\/strong\u003e Feed a 2.5-inch bay from an MCIO header without a backplane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLab benches.\u003c\/strong\u003e Quick U.2 device attach for testing Gen5 SSDs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eDo I still need a separate power cable for the drive?\u003c\/h3\u003e\n\u003cp\u003eNo. The assembly includes the power branch, so the drive’s power comes along with the data cable from a standard internal power source.\u003c\/p\u003e\n\u003ch3\u003eWill it run a Gen4 U.2 SSD?\u003c\/h3\u003e\n\u003cp\u003eYes. The link negotiates to the device speed, so Gen4 and Gen3 drives run at their rated rates.\u003c\/p\u003e\n\u003ch3\u003eMCIO x4 or x8 — which do I have?\u003c\/h3\u003e\n\u003cp\u003eThe 38-pin plug is x4, the 74-pin plug is x8. This cable is x4; if your header is the 74-pin type, use the MCIO x8 to 2×U.2 NVMe cable instead.\u003c\/p\u003e\n\u003ch3\u003eDoes the drive need to be NVMe?\u003c\/h3\u003e\n\u003cp\u003eFor PCIe hosts, yes — U.2 SAS drives will not enumerate on a PCIe port. The cable itself is passive and carries whatever the host and drive agree on.\u003c\/p\u003e\n\u003ch2\u003eIn the box\u003c\/h2\u003e\n\u003cul\u003e\u003cli\u003e1 × MCIO x4 to U.2 NVMe adapter cable with power, 70 cm (SKU SR-0549-AX1)\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eBacked by a 24-month warranty. If a link trains at reduced width or does not appear, contact us with your controller and device models and we will help you isolate the cause.\u003c\/p\u003e\n\u003ch2\u003eRelated\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/diliving.com\/collections\/mini-cooledge-iomcio\"\u003eAll MCIO (Mini Cooledge IO) cables\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/diliving.com\/collections\/u-2-nvmesff-8639\"\u003eAll U.2 NVMe (SFF-8639) cables\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/diliving.com\/products\/mcio-x8-to-2x-u-2-nvme-adapter-sff-ta-1016-gen5-80cm\"\u003eMCIO x8 to 2× U.2 NVMe Adapter, PCIe Gen5, 80 cm\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DiLinKer","offers":[{"title":"Default Title","offer_id":50853338415400,"sku":"SR-0549-AX1","price":36.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0866\/1460\/6120\/files\/4.jpg?v=1761114105"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0866\/1460\/6120\/collections\/3-D.jpg?v=1713411077","url":"https:\/\/diliving.com\/collections\/u-2-nvmesff-8639.oembed","provider":"DiLiVing","version":"1.0","type":"link"}