801 chipset compatible with usb 20 ehci and usb 11 ohci usb 30 interface 10x faster usb 20 supports 4 usb 30 type a compatible with pci express revision 10a compatible with usb 20 and usb 11 transfer rate up to 5gbps plug and play supports hot swap 1 free pci express slot operating systems windows xp vista 78 32 bits and 64 bits with this pci express card you can easily add 4 usb30 ports to your computer or computer system and achieve transfer speeds up to 5gbpsccedil which is 10 ti