PC instantly shuts down when GPU temp. reaches ~67C

[bivur]

Hi, so I have this problem that my pc instantly shuts down when running a game and GPU temp. reaches ~67C. Is it possible that it is set to auto shut down at such temperature? I haven't monitored CPU temp when running a game yet, might it be an issue as well?
Normally GPU temperature is around 30-34C

GPU: Nvidia 660 GTX
i5 - 3570
600w psu

 

[rgd1101]

make and model of the psu? instant shutdown point to a possible power issue.

 

[bivur]

Unfortunately some generic one: Codegen power supply ATX PSU 600W CE PFC
It was already replaced under warranty but the problem persists.

 

[rgd1101]

get a better psu.