4-Port SuperSpeed USB 3.0 PCI Four (4) external 5Gbps SuperSpeed USB 3.0 ports SuperSpeed USB 3.0 is backwards compatible with USB 1.0/1.1/2.0 devices Built-in with both 15-pin SATA power connector & mini 4-pin power connector for added power source to better support power hungry bus-powered devices Ideal connection for digital cameras, scanners, printers, external CD/DVD/Blu-ray writers, hard disk drives, flash memory drives and etc. Supports Windows XP/Server 2003/Vista/Server 2008/Windows 7/Windows 8