This pci express usb 30 card offers a cost effective upgrade that lets you add four usb 30 ports to your computer through a pcie slot it offers two external ports plus two internal usb 30 headers to help adapt your desktop or server to support a variety of usb 30 devices with extra motherboard style usb 30 headers you have the flexibility to add more internal usb 30 devices to your pc when your existing headers are occupied you can connect front panel hubs or card readers using this versatile al