PCIe 3.0 / 4.0 Compatibility Works with PCIe 3.0 and 4.0 x4/x8/x16 slots; delivers up to 32Gbps bandwidth.; SFF-8654 Slimline SAS Converts PCIe to SFF-8654 (SlimSAS) port for U. 2 NVMe SSD connectivity.; U. 2 SFF-8639 Cable Included 50cm cable connects SFF-8654 to SFF-8639 (U. 2) NVMe SSD, plug-and-play.; High-Speed & Stable Supports NVMe 1.3, UASP; gold-plated contacts for reliable signal transmission.; Wide OS Support Compatible with Windows 10+/Linux; ideal for workstation/server storage upgrades.