USB 3.0 PCI-Express controller card with two ports NEC USB 3.0 controller chipset Single lane (x1) PCI-Express interface Throughput rate of up to 5Gbps Supports simultaneous operation of multiple USB 3.0 USB 2.0 and USB 1.1 devices Built-in 4-pin power connecter for receiving extra power from the system Supports super speed (5Gbps) high speed (480Mbps) full speed (12Mbps) and low speed (1.5Mbps) data transfer rates Supports Windows XP 32-bit/64-bit Vista 32-bit/64-bit and Windows 7 32-bit/64-bit.