On start pc reboot

Yesterday i played like 15h but today when i want to start it takes me till claptrap but then my pc reboots randomly 3x tried 3x reboot

I have random pc restarts caused randomaly while playing not sure what it is, I doubt its problem with my PSU, seems like the game is really badly optimized that it causing something weird to happen. I’ve logged my GPU and CPU tems right before restart and they’re fine