Silverstone Tek PCI Express Card with USB 3.0 Internal Connector and USB 3.0 Front IO ports (RL-EC03B) USB 3.0 front I/O bay included Supports standard USB 3.0 internal connector PCI Express gen 2.0 with single lane(x1) throughput 5Gbit/s Offers up to two external USB 3.0 super speed port Support 5V bus power from computer's power supply Build in power connector to receiving extra power from system