Computer Freezes While playing games

Possessive

Distinguished
Feb 26, 2013
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18,635
So here's the thing, two days ago i was playing World of warcraft, everything was working fine but then suddenly my computer froze with only a blue screen. I tried restarting my pc (through restart button) but wasn't working. So I had to Power off directly. After that all my 3D games (Darksiders 2, Witcher 2 and WoW) started freezing with the same blue screen. Only the one's that don't require the GPU load are working properly. As soon as I launch those 3d games, it takes 2 - 3 secs to freeze. I tried doing everything to fix this problem, checking if it isn't overheating, reinstalling drivers, checked Ram with Memtest showing 0 errors and Also reinstalled windows but nothing seems to solve this problem. Checked the graphic card fan which also seem to be working.

Pc Specs are :-
Mobo :Intel Dh55tc
I3 processor 530 2.93 GHZ
OS: Windows 7
Power Supply: Cooler Master GX550 ( Bought 4-5 months ago)
Graphic Card: HiS 7850 2gb ( Also Bought 4-5 months ago)

Any Help would be appreciated. Thanks.
 
So I also ran Prime 95 for 4- 5 hours but still my pc was stable, and I also checked in Funmark which ran for 10 - 15 min then it froze with 77 maximum temperature so i'm guessing that there might be problem with my Graphic card or my PSU.