PCIe x1 to 7 Ports USB 3.0 Expansion Card. Compliant with USB 3.0 Specification. Data Transfer Rate Up to 5Gbps, Backward compatible with USB 2.0 / 1.1.. With Two Power Modules, No Additional Power Supply is Required. PCIe x1 Slot is Needed, Compliant with PCI-E X2 X4 X8 X16 Slot too. with Full-Profile PCI Slot Cover for PC Mounting