Ok, i just built a new Gaming PC for a friend of mine. When it was built it ran fine. Played Hearthstone on it perfect. Got it home to his place and it worked great for a day or so. Now it is restarting as soon as he puts his pin in after boot up. Nothing is over heating, all temps look normal. We tried: Disabling auto restart through windows. Reinstalling windows with a full wipe. Checked to make sure restart button wasn't stuck. Double checked PSU size calc.

I plan to stop by there today to make sure no wires came loose but short of that i am at a loss. Wondering if anyone has had this issue or has any other ideas. After the windows re install, it booted up and let him work for a minute. He installed NZXT cam, Icue, chrome, and Gigabytes RGB software before it dropped back into this restart loop. Any help is appreciated.

Components: Gigabyte x570 elite MB EVGA 2080ti 2x Corsair Vengence Pro RAM 16g Samsung 970 ssd 2tb hdd (cant remember brand) Amd Ryzen 9 3950x Corsair H115i cpu cooler 10 120mm fans Corsair Obsidian 1000d case Corsair cm750 psu