Features NEC UPD720200 chipsetCompliant with PCI Express Base Specification 2.0PCIe 1x bus interfaceCompliant with USB 3.0 Super-Speed (5Gbps), USB 2.0 Hi-Speed (480Mbps), USB 1.1 Low-Speed (1.5Mbps)Complaint with xHCI Specification Revision 0.95Max. 900mA per portWindows XP/Vista/7 (32-bit and 64-bit)OS SupportBus Interface PCI-Express x1Connectors 2 x external USB 3.0 connectors1 x Molex power connector