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Green PCB adapter card with metal bracket, SFF8654 and SFF8639 connectors

SMUGDESK

SMUGDESK PCIe 4X to U.2 SFF8639 Adapter Kit SFF8654 Slimline SAS NVMe PCIe 3.0 4.0

SKU CH-5F40-JF8KR

Adds a U.2 NVMe slot via PCIe 4x using SFF8654 Slimline SAS, supporting PCIe 3.0 and 4.0 speeds

  • Converts PCIe 4x slot to U.2 SFF8639 via SFF8654 Slimline SAS
  • Supports PCIe 3.0 and 4.0 NVMe SSDs for enterprise bandwidth
  • Stable signal transmission ensures reliable U.2 NVMe operation
  • Standard PCIe bracket enables secure installation in servers and workstations
  • Plug-and-play compatibility with Windows, Linux and enterprise OS environments

PCIe 4x to U.2 Adapter Kit

This SMUGDESK adapter kit converts a PCIe 4x slot to a U.2 (SFF8639) interface using an SFF8654 Slimline SAS connection. It supports PCIe 3.0 and 4.0 NVMe SSDs for high-speed enterprise-grade bandwidth. The standard bracket design ensures secure installation inside a PC or server chassis. Plug-and-play compatibility covers Windows, Linux and enterprise operating systems.

Suits servers and workstations needing U.2 NVMe

Ideal for builders adding U.2 NVMe storage to a system with an available PCIe 4x slot. Not suitable for setups lacking a PCIe 4x slot or requiring a different drive interface such as M.2 or standard SFF8639 cabling without the Slimline SAS link. Buyers needing more lanes than 4x should look elsewhere.

PCIe 3.0 and 4.0 protocol support

The adapter operates with both PCIe 3.0 and 4.0 signalling, so the connected U.2 NVMe SSD runs at the speed allowed by the drive and the host slot. This single specification determines whether the kit matches the performance level required for the target storage workload.

How it compares

Measured against everything we stock in SATA, IDE & M.2 Drive Adapters, at today’s prices. Recalculated every night.

Price $18.99
Cheaper than about 65% of the 1,721 comparable items (median $22.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Does the PCIe x4 bracket fit a standard full-height expansion slot?

The adapter uses a standard PCIe bracket that secures in any full-height x4 or larger slot on a desktop or server motherboard.

Which cable orientation avoids signal loss when connecting the SFF-8654 Slimline SAS plug to the U.2 drive?

Align the keyed SFF-8654 connector with the drive receptacle, seat it fully until the latch clicks, then secure the bracket screw before powering on.

When should the SFF-8654 Slimline SAS cable be replaced to maintain PCIe 4.0 link stability?

Replace the cable if the latch no longer holds firmly, if visual inspection shows bent pins or cracked insulation, or after repeated reseating cycles in a high-vibration chassis.

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