Radeon 7950 Overheating or PSU problems?

[CloudedAlex]

Hey! A while ago my computer started acting weird. Some games on my computer make my PC's screen freeze and play the same sound over and over and eventually after maybe 3-5 seconds become completely black. But the computer is still turned on and i can hear the sound repeating. I have checked the temps of everything and the CPU and GPU's temps never exceed ~65 when at full load. The games that i have experienced problems with are games lik CS GO and NMRIH. I recently quit playing League but that game never caused any problems.

So since i don't know what to google (Not very good at English when it comes to talking about computer references) i really need your help. The PSU is a Corsair CX600 i believe. I built the computer 2 years ago and i recently changed thermal paste and pads on the GPU.
(Gigabyte 7950)

Thanks! //Alex

 

[sidfrgaming]

Try to clean ur heatsinks on gpu and cpu
Remember when it comes to pc cooling the name of the gamebis get air in and out fast
So adjust the positions of the cooling fans

 

[sidfrgaming]

The main factor is get air in and out as fast as possible so for that adjust position of cooling fans
Also clean ur heatnsinks(big chunks of metal u see on top of mobo,cpu,gpu,etc.)
Try to keep ur pc as dustfree as possible