Video cars tests??

[jbrdbr111x]

Are there any programs that run tests on your graphics card to see if it is working properly, etc?

When I am playing COD4, going in dark hallways and what not, every now and then when I turn the screen kinda fades out and back in..

 

[jbrdbr111x]

dam, didn't notice the spelling error in the title until it was already posted..