Asus Motherboard P5Q-VM - Manual (Page 49)

ASUS P5Q-VM 1-37
4. USB connectors (10-1 pin USB78; USB910; USB1112)
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 480 Mbps connection speed.
Never connect a 1394 cable to the USB connectors. Doing so will damage the
motherboard!
If your chassis supports front panel USB ports, you can attach a front panel
USB cable to these connectors.
The USB module cable is purchased separately.
5. Serial port connector (10-1 pin COM1)
This connector is for a serial (COM) port. Connect the serial port module
cable to this connector, then install the module to a slot opening at the back
of the system chassis.
The serial port module is purchased separately.