Computer Turning Off Under Load

[Gobel]

Recently my computer keeps turning off when playing games. Everything connected to the pc turns off but pc doesn't turn off. I have to press the power button to turn off the computer than restart. It doesn't happen with every game or when idle but this happens under heavy load. My computer:

• GPU: GTX 1050Ti 4GB
• CPU: Ryzen 5 1400
• Mobo: Asus Prime B350M-A
• PSU: High Power 500W HPQ-500ST-H12S
• RAM: 2x8GB 3000Mhz XPG Gammix D30
• SSD: WD SN550
• HDD: Seagate 1TB 7.2k RPM/ WD 320GB 5.2K RPM
• 1 Corsair Fan 120mm
• Corsair Carbide SPEC-01

I assume the problem is caused by the PSU as the system is 5 years old.

[Fasauceome]

4 minutes ago, Gobel said:

I assume the problem is caused by the PSU as the system is 5 years old.

that is likely. This could also be a mobo defect

[BiotechBen]

That PSU has at best 450W available to 12v rail, and it appears to be a very poor quality PSU at that. I would hazard a guess that even an S12III would be a quality upgrade compared to it. (S12III is not a quality PSU but won't ACTIVELY harm components)

[Gobel]

So I should replace the PSU and if the problem wasn't the PSU, I will get rid off a bad PSU anyway.