The original post: /r/buildapc by /u/Nicksaurus on 2025-03-13 08:59:14.

I got a 7900XTX a year ago, which officially requires an 850w PSU. I already had a Corsair RM750 in my machine, so I tried to get away with continuing to use it. I installed the GPU, everything worked, it was fine

HOWEVER. This week I started playing Avowed, and somehow, out of the dozens of games I’ve played, this is the first one that makes my GPU power consumption spike just a bit too high for my poor little PSU, and my PC started instantly shutting off at random when I was playing

I’ve put a RM1000e in now and everything’s working fine again (I know a 1000w PSU is overkill but I don’t want to have to do this again when the next generation of GPUs inevitably raise the power requirements)

Anyway, hopefully this is helpful for anyone googling to see if they can pair a 7900XTX with a 750w PSU in future. The answer is: You might get away with it but it’s not guaranteed, and problems might not reveal themselves for a long time