Computer “crashes” after 30 seconds of being on

Hello, wasn’t to sure if this is the right spot but here goes nothing, I play a lot of pc games and the other night mid game my computer crashed if you will, just shut down and when I tried turning it on it stayed on for 15 seconds than crashed, thinking it was a heat issue I left it and tried again the next day, I was able to use my computer for about 30 min than it crashed again, not knowing the exact problem I did some research and found a common issue is the switch it self, I removed the switch and replaced it and still having the issue, I cleaned it fairly good and tried running it again this time with out the side panels and it did the same thing, runs good for about 30 min, dies and won’t stay on long enough for the Boot up procrss. Any suggestions is apriciated. Have an ultra durable 970A-Ds3p mother board built by cyber power pc