Interf. USB 3.0 02 Port PCI-E ASRock USB 3.0 CARD ASRock USB 3.0 Card allows you to enjoy the high speed data transfer rate up to 5.0 Gb/s, which is ten times faster than current USB 2.0 standard (480 Mb/s). With two USB 3.0 ports on ASRock USB 3.0 Card, you can enjoy USB 3.0 super speed. Interface: PCI Express 2.0 x1 Connector: 2x USB 3.0 ports