(1). Main Features: 1. A super fast and high-capacity data transfer solution. 2. Compliant with USB 3.0 specification. 3. Date transfer rate up to 5.0Gbps / 625MB/s. 4. Compatible with USB 2.0 & 1.1 specification. 5. Compliant with Single-Lane (x1) PCI-Express specification revision 1.0a. 6. Supports 2.5Gbps PCI-E bus with full duplex channel. 7. With 4 USB 3.0 type A female connectors. 8. Plug & play and hot swapping capability. 9. Bus-powered mode and no external power required for most of peripherals. 10.*4 pin power connector available for some high current consumption peripherals like drives. (2)Characteristics: 1 compliant with USB 3.0 specification revision 1.0. 2 Supports Low-speed(1.5Mbps)/Full-speed(12Mbps)/High-speed(480Mbps)/Super-speed (5Gbps). 3 Supports 4 downstream ports for all speeds. 4 Supports all USB compliant data transfer type as follows; Control/Bulk/Interrupt/Isochronous transfer. 5 Compliant with Intel is extensible Host Controller Interface(XHCI)Specification revision 0.95. 6 Support USB legacy function. 7 Compliant with PCI Express Base Specification 2.0. 8 Supports PCI Express Card Electromechanical Specification Revision 2.0. 9 Supports PCI Bus Power management interface specification revision 1.2. 10 Supports external power socket in order to supplying power for each USB 3.0 connector up to 900Ma Max/port. 11 Supports Windows 2000 / Windows 2003 / Windows XP / Vista / Win 7 / Win 8; (3) System Requirement For System Win XP/VISTA/7(32 bits/64bits) Win 7 and Win 8 Chipset: NEC720201