The VisionTek 2-Port PCIe x 1 USB 3.0 Expansion Card lets you easily harness the power of your computer's fast PCI Express card slots to add two SuperSpeed USB 3.0 ports to your PC or Server through an available x1 or higher PCI Express slot. Support for data transfers up to 600MB/s* nearly 10x faster than USB 2.0. Power USB devices or charge them without needing an AC adapter?each port provides 900mA of power. For further convenience, the card also supports hot-swappable storage connections. Add and disconnect external drives and other USB 3.0 devices as you please.
Expand additional USB ports to connect High Speed USB devices for backing up photos, music, and HD movies to external drives at data transfer rates up to 600MB/s.
*600MB/s speed is maximum bus speed of USB 3.0. Actual speed will vary depending on drive or device connected to card and type of PCIe slot card is installed into.