computer restarts automatically when playing games

[giannis parmaxidis]

hello guyz...

I would like to have a little help from you with my computer issues that i am having for about a year now....

So I have a computer with these specs

cpu intel core i3 4170

gpu msi gtx 960 2gb

mobo gigabyte h97m-hd3

hdd 1tb western digital blue sata

ram 2x4gb hyperx black fury

psu nitrox 750

 

When I run games on full graphics on high quality my computer randomly restarts or shutdown but when I am lowering the quality my computer plays normally....I have thermal paste on my cpu and I noticed something weird...When I have high quality and the computer restarts my graphics card has a high value temperature on it but when I lower the quality and I keep playing without problems my graphics card has lower value temperature...Is it something that can be caused on bad psu or I just need to apply thermal paste on my gpu?

[giannis parmaxidis]

my temperatures are fine and they are all low.... I checked them through speccy and other softwears....And when I usde my gpu on an another computer I was able to play on high quality without having problems

[GreezyJeezy]

your GPU has paste on it already best not to mess with it. just change your case's airflow if its restrictive and change the thermal paste on your CPU. its most likely overheating and shutting off  

 

and you said you had the pc for a year? have you dusted it at all? if not maybe just dusting your pc will help.

 

i'd probably get a new PSU too i never heard of that one its probably shitty 

[giannis parmaxidis]

I applied a new one cpu cooler fun with paste on it but same things happen.... beside that as I told I checked my gpu on another computer and I was able to play without having problems...I lower the cpu power from control panel to 79% from 95% and I was able to play 

[giannis parmaxidis]

I just ordered a new corsair 650 80plus gold is that good enough?

[GreezyJeezy]

3 minutes ago, giannis parmaxidis said:

I just ordered a new corsair 650 80plus gold is that good enough?

if its not a CX it should be good 

[giannis parmaxidis]

its a new corsair vs650 

but I think all this time my computer was restarting cause of power failures