Asus PCIE USB3 True USB 3.0 support for ASUS Motherboards - Native support PCIe Gen2 bandwidth Compatible Models: P7P55D Deluxe, P7P55D EVO, P7P55D PRO, P7P55D, M4A79T Deluxe, M4A78T-E, M4A79XTD EVO Windows7/Vista/XP 32/64-bit also Support for Hot Plug function PCI Express x1 interface; compatible with PCI Express x4, x8, and x16 slots External Connectors - 2 x USB 3.0 ports support of up to 2 USB devices, Backward compatible with USB 2.0 devices