Full Details on Amazon.com : http://www.amazon.com/gp/product/B004GF1PC2?tag=tsukuyomi-20

Western Digital SuperSpeed USB 3.0 PCI Express (PCIe) Card

The next generation of USB connectivity Connect any USB 30 device to your PC
100 compatible with USB 20 devices Requires available PCI Express PCIe port
OS SupportWindows 7 64-bit32-bit