Buffalo PCI-Express/USB 3.0. Host interface: PCIe, Output interface: USB 3.0. Data transfer rate: 480 Mbit/s, Data transfer rate: 5 Gbit/s. Width: 59 mm, Depth: 65 mm, Weight: 39.4 g. Power consumption (typical): 0.6 W. Server operating systems supported: Windows Server 2003, Windows Server 2008, Windows Server 2008 R2, Windows Server 2008 x64