Converts PCIe x4 slot to SFF-8643 Mini SAS connector for U.2 NVMe SSD Connect 2.5' U.2 SSD to PCIe x4 Slot via SFF-8639 to SFF-8643 Mini SAS cable Compatible with PCIe 4.0 Specification, backwards Compatible with PCIe 3.0 Compatible with PCIe x4,x8,x16 Slots Supports Intel 750 Series U.2 SSD Compatible with latest Window Operating Systems 1.64FT SFF-8639 to SFF-8643 Mini SAS cable is Included Full-Profile and Low-Profile brackets are included for PC Case Mounting Note- Only work for U.2 NVMe SSD.(Not work for SAS or Mini SAS HD)