Features: Supports PCI Express2.0 X 1Lane, can transferring up to5Gbps MAX. Supports USB 3.0 specfication typeA Connector X 2ports. Backward compatible to USB 1.1/USB 2.0. Supports the following speed data rate: Low-speed(1.5Mbps)/Full-speed(12Mbps)/High-speed(480Mbps)/Super-speed(5Gbps). Suppots PCI Low profile. Supports External power plug in order to supplying power for each USB3.0. Up to 900mA MAX/port. System Requirements: PC with 512MB of RAM and 1.0GHz or faster processor. 1 available PCI Express 1.x or 2.x slot. for 32-bit 64-bit Windows Vista/Server 2008/Windows 7. Note: To achieve the maximum throughput, the PCI-Express slot must be version 2.0 or higher. Performance per port may decrease if multiple ports are transferring data simultaneously due to limited throughput of the PCI-Express slot. To meet USB 3.0 transfer speed, high quality USB 3.0 cables and devices are required. Supports both 32-bit 64-bit OSes. Make sure the power is well connected; otherwise you will see a Power Surge on Hub Port message error and no 5V bus power in USB ports. The file NEC(Renesas)-201-202-DR-WIN-20120531 of the CD is for PCI Express Card.