Rosewill RC-228U2 PCI-Express to USB 3.0 Controller Card with Low Profile Bracket External Connector: 2 x USB 3.0 Interface: PCI-Express 2.0 Transfer Rate: Up to 5Gb/s per port Operating Systems Supported: Windows 8, 7, Vista, XP and Linux Hot-Swap and Hot-Plug NEC Chipset Supports PCIe 1.0 and PCIe 2.0 motherboard