Sunix USB 3.0 4-Port PCI-E USB-IF Certified Tid 350000211 Supports PCI Express Base Specification Revision 2.0. Single-lane (x1) PCI Express throughput rates up to 5 Gbps. Supports simultaneous operation of multiple USB 3.0, USB 2.0 and USB 1.1 devices. Supports USB data transfer rate of 1.5/12/480/5000 Mbps. Driver supports for Microsoft Windows XP, Vista, 7, 2008, 8 and 8.1 operation systems.