if you say turn off when you dont want to...download hardware monitor and watch your power supply voltages. if your trying to shut it down and in shuts down then resets it self..it a bug in the asus bios...clearing the bios with the jumper will fix it..there a few post about the issues on asus rog forum. if it the first issues as you did not post your power supply spec..it might be a cheap power supply that starting to fail.
850 watt corsair power supply
heres an SS of my HWMonitor
the CPUTIN is locked at 60c i dont think its reading that correctly