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Black circuit-board adapter with SFF-8643 and M-key M.2 connectors

STARTECH

STARTECH M2E4SFF8643 U.2 to M.2 Adapter SFF-8643 to M-Key PCIe x4 ssd accessory

SKU CH-6QBG-E74AY MPN M2E4SFF8643

Connects a U.2 NVMe SSD via SFF-8643 to an M.2 PCIe x4 slot for faster system performance

  • Product colorBlack
  • For use with1 - drive adapter card 1 - adapter-mounting screw 1 - quick-
  • DetailsDrive Connectors: 1 - SFF-8643 (36 pin, x4 PCIe Gen 3) Host
  • Key featuresBoost system performance by adding an enterprise-class U.2 P
  • Add enterprise U.2 NVMe speed to any M.2 PCIe x4 slot
  • Connect one U.2 SSD via 36-pin SFF-8643 Mini-SAS HD
  • Works natively with current OS, no extra drivers needed
  • Cost-effective upgrade path without motherboard replacement
  • Compatible with Intel 750 series and similar U.2 drives

U.2 to M.2 PCIe x4 adapter

This adapter connects a single U.2 PCIe NVMe SSD to an M.2 M-key slot on a desktop or server motherboard. It uses a 36-pin SFF-8643 Mini-SAS HD connector for the drive side and a PCIe x4 host interface. The product targets IT professionals and enthusiasts adding enterprise-class storage without replacing the motherboard.

Passive operation with no extra power

The adapter has no active cooling, fans or onboard controllers, so it adds no noise and draws no auxiliary power beyond the SSD itself. Thermal performance depends entirely on the host slot airflow and the drive’s own thermal design. It operates within standard PCIe Gen 3 signalling limits through the SFF-8643 link.

Mounting screw and quick-start guide included

A single adapter-mounting screw secures the PCB to the motherboard standoff, and a quick-start guide covers the physical installation steps. No drivers, firmware utilities or management software are bundled; the adapter relies on native operating-system NVMe support for immediate recognition.

How it compares

Measured against everything we stock in Drive Brackets & Mounting Kits, at today’s prices. Recalculated every night.

Price $29.99
Typical for this category: the median of 218 items is $26.99.

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Specifications

Product
Brand nameStarTech.com
Model nameM2E4SFF8643
Product colorBlack
Size & build
Shipping weight0.09 kg
Package size102 × 25 × 25 mm
Compatibility
For use with1 - drive adapter card
1 - adapter-mounting screw
1 - quick-start guide

Questions about this item

How do I install the M2E4SFF8643 adapter into my motherboard M.2 slot and where do I connect the U.2 drive?

Insert the adapter M-Key edge connector into an M.2 PCIe x4 slot and secure it with the supplied mounting screw; attach a Mini-SAS HD SFF-8643 cable from the adapter SFF-8643 port to the U.2 NVMe SSD.

What maintenance or replacement will the M2E4SFF8643 adapter need over time?

The passive adapter has no moving parts or firmware; only the SFF-8643 cable or the U.2 NVMe SSD itself may require replacement if they fail.

What is the first performance limit I will hit when running a U.2 NVMe SSD through this adapter under sustained load?

The adapter provides a PCIe Gen 3 x4 electrical link via the SFF-8643 connector, so the bus bandwidth ceiling appears before any adapter thermal limit.

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