Add 2 superspeed usb 30 ports to a computer through a pci slot the pciusb3s22 2 port pci to usb 30 card enables you to connect usb 30 peripherals to a pc through a legacy pci host bus which doubles the data transfer speeds when used with usb 30 peripherals than would be possible with a usb 20 host connection up to 13 gbps pci bus limit the card features an optional sata power connection which enables each port to supply up to 900ma of power to usb 30 bus powered devices by