VisionTek Products Four Port USB 3.0 x1 PCIe Internal Card for PCs and Servers - 900870 Adds four Super Speed USB 3.0 ports, each with up to 5Gb/s (600MB/s) data rate, up to 10x faster than USB 2.0. Fully powered by the PCIe bus, does not require molex or sata power cable. Power USB devices or charge them without needing an AC adapter, each port provides 900mA of power. USB 2.0/1.1 backward compatible allows the VisionTek 4 Port USB 3.0 x1 PCIe Internal Card to work with legacy USB devices. Hot swap capable means you can add and detach devices without rebooting.