Question Friend's computer crashes when opening and closing games ?

Specs are
GPU: gtx1060 6gb
CPU: Ryzen 5 26000x He belives
RAM: 2 DDR4 16GB
Motherboard: Msi x470 gaming pro carbon
PSU: CORSAIR CX550 80 Plus Bronze 650 watt
As of this message he cant sign into his pc, because of crashing so often.
Full Specs would help too.
 
Turns completely off without warning. He’s planing on reinstalling windows to see if it fixes the problem
 
That model is a 550w PSU, yet you posted 650w. Which is it?

Was the original PSU the same model?
Like i said, I don't know the original PSU. It just got replaced, I can pull up amazon listing he bought it from. PSU. I think its not the PSU because its been replaced.