acomdata 2-Port SuperSpeed USB 3.0 PCI-Express Card Model ADPU3-PCIX Type: PCI Express to USB Card External USB Ports: 2 x USB 3.0 Ports Standard: USB 3.0 Data Transfer Rate: Up to 5.0 Gbps Operating Systems Supported: Win XP/Vista/7 (32-/64-bit) Specifications: External connectors: 2x USB3.0 Mainboard connector: PCIe 1X Output voltage: DC 5 V Output current: 900 mA/port Weight: 0.5