Transcend USB 3.0 Adapter PCIE for Desktop PC (TS-PDU3) Add USB 3.0 ports to any desktop computer with a PCI Express slot Connection bandwidth up to 5Gbits per second (in USB 3.0 mode) Ultra-fast PCI Express interface eliminates speed bottlenecks Installs easily in PCIe x1 slot Backwards compatible with USB 2.0 and USB 1.1 devices Supports PCI bus power management interface rev. 1.2 Two external USB 3.0 ports Fully compatible with PCI Express 2.0