PC randomly shuts down whilst playing high demanding games

[lsycamore]

Hello,
I have had an issue with my built computer made of all components listed. The pc randomly shuts down without any notice when I am playing any high demanding-game such as GTA V. I have reinstalled drivers and windows but neither seemed to fix the issue. I have used OCCT power supply test, in which the pc shut down without any notice or BSoD. I am thinking of returning the psu or gpu due to the persisting issue.

 

[RememberThe5th]

Specs?
CPU-
GPU-
Mobo-
Ram-
PSU-

 

[sonofpern]

This used to happen to me when I upgraded my graphics card on my current system and overclocked the GPU and RAM in software (MSI afterburner). No indications of problem, just suddenly blank screen and POST back to windows. This happened in games and in Kombustor testing. Turned out the PSU was not strong enough, replaced it and no problems since. I also learned to make sure Afterburner wasn't going to autorun at bootup in case the config crashed it Just a shot in the dark though, until you post your system specs

 

[cdgamerz]

Specs?