Computer Shuts Down While Playing NEW GAMES - kernel power

[nigeez]

So yeah my problem is that my computer keeps shutting down when playing games like, Watch Dogs, Assassins Creed IV, Bf3, but it seems to work on lower games like CS:GO.
I tried running MSI kombustor, and it wouldn't shut down with it. Temperatures are okay, i did check them all. I have had this computer for 4 years, finally bought new GPU. Problem started maybe 3 years ago, but it hasn't happened for a while, since i havent played "good" games for a while. Computer crashes only when playing.

Specs:
AMD PHENOM II x6 1055T
MSI GTX 760 twinfrozr 2gb OC edition
8GB RAM
WINDOWS 7 64bit
PSU: (weird and cheap?) Axpertec AXP-630P12P 630W

Power should be enough but it seems like that PSU is not trustable.
If I didn't tell something please ask me to tell.


I have cleaned all components, run memtest and so on..

 

[popatim]

Cheap psu's often list thier peak wattage instead of the maximum continuous wattage to make the psu sound better than it really is. Pick up a quality psu and dont play anything until you install it would be my recommendation.

 

[nigeez]

Cheap psu's often list thier peak wattage instead of the maximum continuous wattage to make the psu sound better than it really is. Pick up a quality psu and dont play anything until you install it would be my recommendation.

Okay I will buy new one. Got any recommendations? Which will be enough for this system.

 

[nigeez]

But you do have any other things i could try?

 

[nigeez]

bump.
I found temporary fix, i made GPU max power to about 75% and now its seems i can play like hour without a problem, so i think you can confirm it as PSU problem.