Add two usb 30 ports through a mini pci express slot the mpexusb3s22b 2 port mini pci express usb 30 card with bracket kit adds two external usb 30 ports to small form factor systems for connecting a variety of different peripherals the card also includes optional standard and low profile brackets to fit a rear expansion bay if needed the mini pcie usb 30 card supports the full superspeed usb specification with fast data transfer speeds up to 5gbps as well as 900ma of power per po