ASROCK X79 Extreme4 Handbuch Seite 30

2.9 ASRock XFast Charger Operation Guide
ASRock XFast Charger is the best and
fastest technology to charge your mobile
devices via PC. With the superb XFast
Charger USB port, users are assured to
enjoy the quick charging experience
anytime. In addition to Apple devices, it
is also capable of Charging the BC 1.1
standard smart devices. Please refer to
below instruction for proper operation.
This motherboard provides two USB ports for ASRock XFast Charger:
1. USB 2.0 port (USB0) on the I/O panel
see p.3 No. 14
2. USB 2.0 port (USB6) header
see p.2 No. 30
With ASRock XFast Charger feature, you can freely enjoy the quick charging
convenience by installing the USB cable on these two ports.
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ASRock X79 Extreme4 Motherboard