SOZ EASYGO(TM) 4 Port 5gbps Superspeed Pci-e USB 3.0 Backwards Compatible with USB 1.0 1.1 2.0 Card Adapter 20-pin Connector Expansion Addon Control Card Adapter Plug-n-play Hot Swap Compatible for Window Xp Vista 7 8 Supports the following speed data rate as follows: Low-speed (1.5 Mbps) / Full-speed (12 Mbps) / High-speed (480 Mbps) / Super-speed (5 Gbps) Supports all USB compliant data transfer type as follows: Control / Bulk / Interrupt / Isochronous transfer Each USB Port supplies maximum +5V/900ma power output to USB device. Support Windows XP / Vista (32/64 bit) /Win7 (32/64 bit)