My PC shuts down like the power was pulled and automatically restarts after a few hours when playing certain games, namely ones with high fps outputs. I'm 90% sure it's my power supply at this point, but before I buy a new one how can I test it? I'm not gonna buy anything, I'd rather just risk it and buy a new power supply, so please only suggest like certain things like stress tests or software to monitor things. I have already tried HWmonitor and HWinfo to check my voltages, HWMonitor doesn't give me any readings, and HWinfo gives me +12v readings that are wayyy off. My voltage readings under no stress I found in the BIOS seem normal.
Specs:
i5-4460
4x 2GB 1066 ram sticks
Asrock h97 anniversary
GTX 1070
2tb hdd
evga 600b
Specs:
i5-4460
4x 2GB 1066 ram sticks
Asrock h97 anniversary
GTX 1070
2tb hdd
evga 600b