The pciusb3s4 4 port pci to usb 30 card enables legacy pci slots to support the superspeed usb 30 standard which is capable of data transfer rates up to 5 gbps using usb 30 devices with this card will increase data transfer rates with up to 13 gbps of available bandwidth pci bus limit more than doubling performance compared to a usb 20 connection this versatile usb 30 adapter includes an optional sata power connector which allows each usb port to deliver up to 900ma of power to conn