Asus MAXIMUS VIII EXTREME User Manual page 58

4. USB 2.0 connectors (10-1 pin USB1314; USB1112; USB910)
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!
1 x USB 2.0 ports (USB1314) at mid-board shares with ROG extension (ROG_EXT) port.
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Chapter 1: Product Introduction