USB 3.0 controller with 2 external ports and 2 internal ports (20 pin USB 3.0 header)
Data transfer rate up to 5.0Gbps, Backwards compatible with USB 2.0 & 1.1 items.
PCI-Express 1x slot (will fit 4x, 8x, 16x slot too)
4 pin Molex power connector for providing power to multiple external items such as hard disks.
Includes driver CD and low profile / half height fitting bracket.
Note: The molex power connector on this card is not optional - you must plug in a power source for devices to work.
Recommended: Windows 7 users should use the updated driver found here: http://www.via-labs.com/archive/doc/VIA_XHCI_Driver_V4.90A_AP.zip