Features : 10 times faster than High-Speed USB 2.0 Newest NEC / Renesas 720201 chip set 4 External USB 3.0 Port Low profile + standard bracket Specification : Support Win 8 USAP, no driver needed Complies with PCI Express Base Specification Revision 2.0 Complies with Universal Serial Bus 3.0 specification Revision 1.0 Backward compatible to USB 2.0 and PCI-Express 1.0 4 Pin Molex Power Connector connecting to PC Power supply Supports the following data transfer rate: - USB 2.0 mode up to 480 Mbps* - USB 3.0 mode up to 5 Gbps* Max.