HD4670 crash repeatedly.

[metallicus]

I have just bought a MSI R4670-MD512(the one with HDMI connection).
But recently I've been experiencing repeatedly shutdown.
This does not happen at all when I do not play video games.
When I play MW2, it crashes after every half an hour, while it takes around over an hour for America's Army 3, and does not crash at all while playing Iris Online.
My specs:
PSU: Huntkey 450W
Mainboard: MSI G31+
RAM: 2x1GB 800Mhz
CPU: Intel Pentium D 925
GPU: MSI R4670-MD512
OS: Windows 7 Build 7601.
Catalyst version 11.6/

 

[renz496]

check your cpu and gpu temperature when playing the games. other than that it could be your PSU fail to properly feed the needed power to your system