PC crashing after a few minutes after booting up or running smoothly for hours

Hello!

As the title says I’ve been having trouble with my PC for the last two weeks. All of a sudden the PC hard freezes if I launch a game after about 2-5min. But eventually it runs perfectly and I can run it for hours without any performance issues.

I really xan’t wrap my head around it. I’ve reset the PC, reinstalled windows and updated my nvidia drivers with no success. Temperatures seem stable too, I’ve had my PC for about 5 years with no issues.

If anyone has any tips as to where to start looking in to this or any help I would greatly appreciate it!

SPECS: Processor: Intel i7-10700F 2.90GHz RAM: 32GB ddr4 GPU: Nvidia GeForce RTX 3080 10GB