Buffalo  SuperSpeed USB 3.0 PCI Express 2-Port Interface Card IFC-PCIE2U3 SuperSpeed USB 3.0: Provides accelerated file access and transfer speeds, up to 5 Gbps Compatible with USB 2.0 and 3.0: Support for legacy USB 2.0 and SuperSpeed 3.0 Connects to USB on any PC Package Contents: USB3.0 Interface Card for PCI Express IFC-PCIE2U3 , Setup CD-ROM with Drivers, Low Profile Bracket OS Capatability: Windows 7 (32-bit/64-bit), Windows Vista (32-bit/64-bit), Windows XP