My pc which I have had for a year and a half now recently started crashing. I have a 650 watt seasonic gold psu. The fan stopped working on the power supply a few days ago but then worked today. The power supply has more than enough power for my system which has a 5700xt and ryzen 5 3600x. The pc crashes when I launch games but only certain ones? Could this be a software issue or hard are issue. I can run a stress test for an hour and not crash. I believe it is the power supply though. Please help.