Computer freezes when playing games!

[Cythen]

Hi guys i have a little problem when ever i play a game after 10min and up to 2 hours my computer will lock up. What happens is ill be playing a game like WoW or lineage 2 and the screen distorts really bad or the screen will just go black. It locks up my computer and i have to manually restart the computer each time this happens and it only happens when im playing a game. I have updated all my video drivers windows updates things like that. I have also ran stress tests on my Video card but everything seems fine with those tests i am at a complete loss as to whats happening. the comp is about 3 months old and this started about a month ago and its getting more frequent. If anyone has any ideas or has run into this problem before any help would be greatly appreciated. Thanks


Specs:
Amd phenom x4 2.3ghz
Gigabyte AMD 769 HDMI MB
Nvidia GeForce 9800 GTX+ 512mb 256-bit
G.SKILL 4gb(2 x 2gb) ram
Windows 7 OS
WD 160gb HD

 

[Nebastion]

Any Strange noises? Like unusually loud fans?

Did you contact the People you Bought it off?

Could be over heating, What kind of case is it in?

 

[p0tn00dl3]

Sounds like a Graphics card overheat issue but have also seen this caused by a Faulty 12v rail on the PSU. Check that the fan for your GPU is not mucked up with dust.