GWC PU3040 USB 3.0 4-Port PCI Express Card 4 Ports USB 3.0 Compliant with Universal Serial Bus 3.0 Specification Revision 1.0 Supports the following speed data rate as follows; Low-speed (1.5 Mbps)/ Full-speed (12 Mbps)/ High-speed (480 Mbps)/ Super-speed (5 Gbps). Supports 4 downstream ports for all levels of speed. Supports all USB compliant data transfer type; Control/ Bulk/ Interrupt/ Isochronous transfer. Compliant with PCI Express Base Specification 2.0. Supports PCI Express Card Electromechanical Specification Revision 2.0. Supports PCI Bus Power Management Interface Specification Revision 1.2. Supports power each port up to 900 mA.