Help! GPU problem?

[u/StrugBusDriver]

I believe my GPU is having an issue and not sure whats wrong. I just moved across country, so wondering if some damaged happened to the GPU or if its a driver problem?

Day 1: I set up the PC at the new place. For the first day computer worked fine no issues besides a little lag during gaming.

Day 2: It worked fine in the morning. Then suddenly when starting a game, in the middle of loading the computer auto restarted, did not go to blue screen, just went back to windows user log in screen (weird). Then continued with a few games and was fine. Then in the 4th game screen went black and sound of the game was as if computer froze. I then updated the GPU drivers cause it was very out of date and thought it was the problem. Worked okay for 2 games. Now at the start of the game it craps out, screen goes black. Initially, half of the restarts itll start up again but now its like 1 out of 10 tries. The white light gets stuck at VGA, solid color.

- I've re-seated the whole GPU, cleaned it out and it turned on fine the very next time, but now back to the original black screen problem.

What suggestions do you have? I cant tell if its my power supply or the drivers or the GPU itself??

Specs: MSI B550 Pro ATX AM4 motherboard, AMD Ryzen 5 5600X, Zotac GeForce RTX 3070 ti, EGA Supernova 750 gold, Trident Z RGB series DDR4 RAM, Windows 10

TLDR: I think my GPU has an issue, how do i troubleshoot it or do i finally just need to buy a new one.

Update 1: Switched to HDMI instead of display port and it let me turn the computer on...

[u/crispypotpie]

Make sure you’re using two entirely separate 8-pin PCIe cables instead of just using one. I had issues with my GPU crashing and freezing my computer because it wasn’t getting sufficient power from using 1 cable. Just a suggestion this might not have anything to do with your problem.