As the title suggests, my pc just months ago started to shutdown on its own then restarts. This doesn't happen before and when i say it shutsdown meaning it abruptly powers off like all of my rgbs on all my peripherals and on the case turn its lights off (not windows showing shutdown screen) then after few seconds it powers back on. The shutdowns are very random, the first times it happened is very frequent like after a few 10 or 15 mins but after i clean reinstalled windows its now at every few hours like 5 or 8 hrs. At first i thought it was software related but it turns out that its not. I tried everything and now my last suspect is the power supply. It is a Corsair AX 1200i psu. I also noticed that its self test button lights up green when my pc is turned on, is this normal? Please help as im running out of ideas already.