SIIG JU-P40212-S1 JU-P40412-S1 4-Port USB 3.0 PCIe Works with high-bandwidth USB 3.0 devices, such as external hard disks, high resolution webcams, video surveillance cameras, digital video cameras, multi-channel audio and more Adds four external Super Speed USB 3.0 ports to your PCIe-enabled desktop PC Supports data rate up to 5Gb/s and backward compatible with USB 2.0/1.1 devices