{"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","url":"https:\/\/diliving.com\/products\/diliving-pcie-4-0-x4-to-u-2-sff-8639-nvme-ssd-70cm-cable-no-additional-power-plug-required","provider":"DiLiVing","version":"1.0","type":"link"}