Add two usb 30 ports to your desktop computer through a pci express slotr r increase efficiency of your usb 30 devices with up to 5 gbps of bandwidthr r fits into full or low profilesmall form factor sff systems with a dual profile designr power high powered usb devices as necessary with the optional sata power connectorr r the pexusb3s23 2 port pci express usb 30 card lets you add two usb 30 ports to any pci express enabled computer system with an optional sata power connector to conn