Sedna - PCI Express USB 3.0 4-Port Adapter (2E 2I (20 Pin Internal Port)) with Low Profile Bracket, Support Win 8 UASP 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 Connect to Floppy power cable of power supply or 4 Pin molex power connector with the included converter cable Supports Windows XP/2003/Vista/7/8/ 8.1