PCIe 4.0 x4 SFF-8643 Host Adapter Card Kit, PCI-E X4 to SFF-8643 Mini SAS HD Riser Card + SFF-8643 to SFF-8639 U.2 NVMe Extension Cable Set, for Motherboard 2.5" U.2 SFF-8639 SSD Storage Expansion

This all-in-one storage expansion kit includes a PCIe X4 to SFF-8643 Mini SAS HD adapter card and a dedicated SFF-8643 to SFF-8639 U.2 NVMe interconnect cable, designed to add external 2.5-inch U.2 NVMe SSD capability to motherboards without native U.2 ports.

The PCIe 4.0 x4 expansion card installs into any PCIe x4/x8/x16 motherboard slot, converting PCIe high-speed lanes to standard SFF-8643 Mini SAS HD signal output. Paired with the matching SFF-8643 to SFF-8639 cable, it seamlessly links the adapter to server U.2 backplanes, hot-swap NVMe bays and enterprise SSD enclosures.

Manufactured with 4-layer high-density PCB and precision 100-ohm impedance shielding, the adapter minimizes electromagnetic interference and signal loss under sustained high-load operation. The interchangeable full-height and low-profile brackets support compact 1U rack servers and standard desktop chassis. Gold-plated locking connectors provide tight anti-vibration contact to avoid intermittent connection failures during long-term data center running.

Compatible with mainstream Windows, Linux, VMware and server operating systems, widely used for workstation NVMe cache expansion, enterprise server storage upgrade, NAS multi-drive array deployment and U.2 SSD hot-swap backplane connection projects.