The PCE722 4-port USB 3.0 Gen 1 PCI Express card allows you to add two USB 3.0 Gen 1 ports to any PCI Express-enabled computer system, with an optional LP4 power connector to plug into your system's power supply to provide up to 900 mA per port for USB 3.0 Gen 1 bus-powered devices (500 mA for USB 2.0).