PCIe 3.0/4.0 to SFF-8654 Slimline SAS Adapter with SFF-8639 U.2 NVMe Cable, PCIe x4 SlimSAS Converter Card for Motherboard 2.5 U.2 NVMe SSD Storage Expansion

This all-in-one storage expansion set consists of a PCIe Slimline SAS adapter card and dedicated SFF-8654 to SFF-8639 U.2 cable, designed to add U.2 NVMe SSD support for motherboards lacking native SlimSAS ports.

The adapter card plugs directly into PCIe x4 slots of desktops, workstations and servers, outputting a compact SFF-8654 Slimline SAS port compliant with PCIe 3.0 and PCIe 4.0 protocols without bandwidth limitation. The matched cable features SFF-8654 connector on one side and standard SFF-8639 U.2 terminal on the other, with built-in 15Pin SATA power lines to deliver continuous power supply to enterprise U.2 SSDs and simplify messy internal chassis wiring.

Adopting impedance-controlled pure copper differential pairs and dual-layer aluminum foil shielding, the cable effectively blocks electromagnetic interference and reduces signal attenuation under long-duration heavy read-write loads. All contact pins on both connectors are gold-plated to lower transmission resistance and resist oxidation after years of round-the-clock use; built-in locking latches prevent loose connections triggered by chassis vibration.

Equipped with a standard full-height PCIe bracket, the adapter fits ATX, MATX and mini-ITX chassis. Driver-free plug-and-play design supports Windows 10/11, Linux and Windows Server systems, specially optimized for NVMe PCIe SSDs and incompatible with regular SATA/SAS hard disks. It is an ideal upgrade solution for video editing workstations, small NAS devices, server storage arrays and high-performance computing hardware, and the flexible cable facilitates neat internal routing without obstructing cooling airflow.