ASRock Add-On Card (U.2-KIT) M.2 (NGFF) PCI Express x4 interface Supports data transfer rates up to Gen3 x4 (32 Gb/s) Compliant with M.2 Sockets 1 x Mini-SAS HD Connector (Supports U.2 PCIe 3.0 x4 SSDs) Microsoft Windows 10 64-bit / 8.1 64-bit / 7 32-bit / 7 64-bit