Question Can my powersupply cause black screens?

[ZanderCombrinck]

My PC has started about 3 days ago to randomly when gaming to go to a black screen but its still on and looks like it working. When I undervolt my gpu (rx570) it works just fine. I also took my gpu to my friend and we tested it on his PC and the thing ran like it should without any hiccups. I did my reaserch and the fist thing that came up was a faulty powersupply. I just want to make sure its my psu before buying a new one.

 

[richiestang_78]

What power supply do you have? And what wattage is it?