Features: brand new and high quality Compliant with PCI for Express specification revision v3.0, backward for PCIE V2.0 and V1.0 motherboards PCI-E X16 U.2 SFF8639 2.5-inch NVMe SSD adapter is directly connected to the motherboard, it supports ultra-fast PCI-Express V3.0 X16 channels.. Supports one U.2 SSD drive; U.2 SFF-8639 SSD gets 3.3v power from motherboard PCIe bus slot. Through this adapter, the system speed can be increased, and the efficiency of office and entertainment can be improved. Transmission bandwidth is up to 32GT/S, and can support U.2 SFF-8639 2.5-inch SSD Drive size. Specifications: Item: PCI-E X16 to U.2 2.5'' SSD Adapter Card (SFF8639 Riser Card) Size: approx 150x120x80mm/5.91x4.72x8.15in Material: Metal Bus Type: PCI for Express X16x Rev 3.0 Transmission Medium: U.2 SFF-8639 NVMe SSD Connector Transmission Rate: 32 GT/S (PCIe Gen 3x4) Hard disk compatible: U.2 SSD, SAS SSD, SATA 7+15 SSD, 2.5-inch solid state drive Operating temperature range: -40℃~85℃ Operating system: for Windows 10, for Windows 8, for Windows 8.1, for Windows Server 2012 R2, Linux, Fedora, Ubuntu, Red Hat native drivers support PCIe NVMe Package Includes: 1 X Expansion Card 1 X Fixing Frame note: No driver is required because the driver is transparent to the operating system and needs to support NVMet protocol. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement.