Asus P8P67 PRO - Manual (Page 40)

2-22 Chapter 2: Hardware information
Chapter 2
4. USB 3.0 connector (20-1 pin USB3_34)
This connector is for the additional USB 3.0 ports. Connect the bundled USB 3.0
bracket cable to this connector, then install the USB 3.0 bracket to the rear side of the
chassis. If your chassis support customised front panel installation, with ASUS USB 3.0
header, you can have a front panel USB 3.0 solution.
You can connect the front panel USB cable to the ASUS Q-Connector (USB, blue) first, and
then install the Q-Connector (USB) to the USB connector onboard if your chassis supports
front panel USB ports.
Never connect a 1394 cable to the USB connectors. Doing so will damage the motherboard!
5. USB 2.0 connectors (10-1 pin USB910; USB1112; USB1314)
These connectors are for USB 2.0 ports. Connect the USB module cable to any of
these connectors, then install the module to a slot opening at the back of the system
chassis. These USB connectors comply with USB 2.0 specification that supports up to
48 Mbps connection speed.