usb charging while turned off

[vaynard]

how do you turn off usb power/charging when your computer is shut down?
mb gryphon z97
psu seasonic x 750
vc r9 280x
mem 8gig 1600 ddr3

 

[zink1701]

On some boards you cant, the only work around is to turn off the PSU with the switch at the back of the unit or unplug from the mains.