Technical Specifications 801 Chipset Compatible with USB 2.0 EHCI and USB 1.1 OHCI. USB 3.0 interface (10x faster USB 2.0) Supports 4 USB 3.0 Type A Compatible with PCI-Express Revision 1.0a Compatible with USB 2.0 and USB 1.1 Transfer rate up to 5Gbps Plug and Play Supports Hot-Swap 1 free PCI Express slot Operating systems Windows XP /VISTA / 7/8 (32 bits and 64 bits). Features Warranty: 2 years System Requirements 1 free PCI Express slot Operating systems Windows XP / VISTA / 7/8 (32 bits and 64 bits). Connection and Interfaces 4 USB ports 1 MOLEX power internal PCI-E connection . Package Contents APPPCIE4P Quick Installation Guide Installation CD with drivers