SABRENT USB 3.0 2-Port Desktop PCI Express Card Model PCIX-USB3 Type: PCI Express to USB Card External USB Ports: 2-USB 3.0 Type-A-ports Standard: USB 3.0 Data Transfer Rate: Up to 5.0 Gbps Operating Systems Supported: Windows XP/Vista/7 (32/64 bit OS) Package Contents: PCI-Express USB 3.0 card Drivers CD