Based on GIGABYTE's unparalleled 3x USB power boost design, plus an entirely new hardware design, GIGABYTE ON/OFF Charge Technology provides a set of white and red colored USB pin headers that can easily be connected to your system's front USB 2.0 ports, that not only act as a normal USB port, but also double as a quick charge ports for your mobile device. It doesn't matter if your iPhone, iPad or iPod Touch is
plugged into the quick charge USB port while the system is turned on, in sleep/standby mode, or even turned off, as it always enables you to charge your iPhone, iPad or iPod Touch.
On/Off Charge will also cut the charging time by up to 40 percent thanks to yet another innovative GIGABYTE design. The reduced charging time means it only takes about two hours to fully charge your iPhone, iPad or iPod Touch, something that would take in excess of three hours using a standard USB port.
Thanks to gigabyte for that answer, and to clairfy a bit it states even front usb ports so it would be whatever ports you have connected to the motherboard heades, How can you tell if it is working time it on charger then use it then time it on computer and remember the results are skewed from the beginning cause you have no way to guage state of charge exactly on phone.