SEDNA - PCI Express USB 3.0 4-Port Adapter (2E2I) 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 Low Profile bracket for installation in small size HTPC case VIA VL 805 chip set Supports Windows XP/2003/Vista/7/8/8.1