The pexusb3s4v pci express usb 30 card with sata power adds 4 external usb 30 ports to any pci express enabled computer system superspeed usb 30 provides up to 5 gbps of data bandwidth while remaining backward compatible with existing usb 20 devices at 480mbps using a stacked port layout that places the ports one on top of the other more ports are able to fit into a smaller space this 4 port pcie usb 30 adapter enables all four usb 30 ports to be external facing while still allowing the card t