SEDNA PCI Express USB 3.0 4 Port Adapter (2External + 2 Port Internal with 20 Pin connector), with Low Profile Metal Bracket Specifications: • Support Win 8 ( no need driver for Win 8, and please do not install our driver in Win 8, use the built-in driver from Win 8 ) • 2 x external and 2 x internal USB3.0 port with 20 Pin Connectors • Low Profile bracket for installation in small size HTPC case • Each port provides DC 5V 1A via USB 3.0 connector • Connect to Floppy power cable of power supply or 4 Pin molex power connector with the included converter cable • VIA VL812 chip set • 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 • Connect to PC power supply to provide enough current for each port • Transfer Rate: 5Gbps 480Mbps, 12Mbps • Fully compatible with USB2.0 , USB 1.1 • Supports Windows 2000/XP/2003/Vista/7/8/ 8.1 • Fits perfectly with our 2 Port USB 3.0 front panel (SE-FP-USB3-22M ) (not included) Package Contents : 1 x PCIE USB 3.0 adapter 1 x Driver CD 1 x Floppy Power to 4 Pin Molex Power converter cable