The ASTROTEK Super Speed PCI-E to USB 3.0 19-Pin 4 Port PCI Express Expansion Card Adapter MOLEX 4Pin Connector with Driver CD for Desktop.Hot-swapping feature allows you to connect/disconnect devices without powering down the system • PCI Express throughput rates up to 5 Gb/s • Compliant with USB 3.0, backwards compatible with USB 2.0/1.1 devices • Connectors: USB 3.0 Type A Female (4 x External) & 4 Way Molex Power