... ) Supports 2 downstream ports for all speeds Supports all USB compliant data transfer type as follows: control, bulk, interrupt, synchronous transfer ... Supports USB legacy function Operational registers are direct-mapped to PCI memory space Supports serial peripheral interface (SPI) type ROM System ... Power supply: 3.3V and 1.05V USB 3.0 PCI-E Card with 5Gbps, 480Mbps, and 12Mbps Transfer Rate