Here are some pc specs: 5070Ti, 7 7800X3D, B850, 32 gigs ram and a 850w psu.

Problem: Whenever I do anything slightly intensive, my pc will randomly turn the screen black, then off, all the fans will stop spinning but the RGB lights will stay on, and it won’t be able to turned off via the case button, I have to unplug it to shut it off and turn it back on.

I built the pc about a month ago and it first happened some weeks back when my gf was playing Minecraft. I had played previously getting crazy framerates and shaders and everything but it never shut off for me, it happened to her twice. Then when I played Deltarune all day for like 3 days it didn’t shut off once. Yesterday, hopping on discord to play Peak with some buddies, it happened constantly. I ran an OCCT Power test and it happened again 9 minutes in, so I thought it was that. Borrowed a PSU from a buddy that I knew worked well, installed the new one and rewired the whole thing, only for it to happen again on Peak today and now I’m out of ideas. I’d rather not take it to a shop if I don’t have to, so I’m opening it up to Reddit.

Temps are well under top limits and all my fans work. There are no red lights on my motherboard. It works absolutely perfectly until it just shuts off and leaves the fan rgbs on. Any ideas?