SIIG"s DP USB 3.0 4-Port PCIe i/e - Value is a high performance adapter card instantly adds four USB 3.0 ports (3 external & 1 internal) to your PCIe-enabled desktop computer, immediately enhancing your existing system with the latest USB 3.0 technology. It delivers ultra-fast USB 3.0 data transfer rates of up to 5Gb/s (10 times faster than USB 2.0) for connecting a wide variety of high-bandwidth USB 3.0 devices such as external hard disks, high resolution webcam, video surveillance cameras, digital video cameras, multi-channel audio and more. It is backward compatible with USB 2.0/1.1 devices and supports per port over-current protection. This dual profile PCIe i/e adapter card works with full height and low profile chassis system with the included bracket providing the utmost flexibility in system chassis installation