Startech U.2 To M.2 Adapter For 2.5 U.2 Nvme Ssd M2E4SFF8643, 1 - Drive Connectors: SFF-8643 (36 pin, x4 PCIe Gen 3), 1 - Host Connectors: M.2 (PCIe, M-Key, AHCI/NVMe, NGFF), Interface: M.2 PCIe (x4 PCIe), Bus Type: PCI Express, Number of Drives: 1, Compatible Drive Types: U.2 (PCIe, NVMe, SFF-8643), Drive Installation: Fixed This PCI Express U.2 to M.2 adapter makes it easy to install a high-performance U.2 PCIe-NVMe SSD into your desktop PC or server and connect the drive through an M.2 PCIe x4 slot on your motherboard.