SOZ EASYGO(TM)2 Port 5Gbps Superspeed PCI-E USB 3.0 Backwards Compatible with USB 1.0 1.1 2.0 NEC D720201 Chipset 20-Pin Connector Expansion Addon Control Card Adapter Plug-N-Play Hot Swap Compatible for Window XP Vista 7 8 Compliant with USB 3.0 specification Revision 1.0 Supports Windows Xp/Server 2003/Vista.Server 2008/Windows 7 Built in 4-pin molex power for better support on power hungry bus-powered devices USB 3.0 is backwards compatible with USB 1.0/1.1/2.0 devices Ideal connection for hard disk drives, digital cameras, scanners, printers, external CD/DVD/Blu-ray writers, flash memory drives and etc