The pexusb3s4v pci express usb 30 card with sata power adds 4 external usb 30 ports to any pci express enabled computer system with support for data rates up to 5 gbps while remaining backward compatible with usb 20 1x devices enhanced with uasp support usb attached scsi protocol this usb 30 controller performs up to 70 faster than conventional usb 30 when paired with a uasp supported enclosure note uasp requires a compatible operating system using a more efficient