…. You understand that just because a pc has a 1200W psu, it doesn’t mean it pulls anywhere near that right?

PSUs are spec’s out ideally for around 70% total capacity power draw on the reg since thats where your typical power efficiency curve peaks.

And you haven’t needed to pull that kind of power on a system unless you are 1) cryptomining or 2) running multiple flagship gpus which runs in the order of several thousand dollars in the past few years, which if OP had the liquid capital for, probably wouldn’t be renting from a slumlord with roommates.