Question Trouble shooting auto reboots

Feb 25, 2019
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I just upgraded MOBO to ASUS PRIE X470-Pro, with a RYZEN 2600x and new Patriot Viper memory. Everything runs fine until I get into a video game. Have Radon R7-360 GPU. The computer just does an instant restart after 5 min of gaming. Does not restart just using windows. I have turned off Win auto reboot function with no help. I have set all BIOS options back to default. Kind at a loss on how to start trouble shooting this. My best guess is it has to be MB, Memory, GPU, or Power Supply. Any help on how to start?
Thanks