Getting arifacts in call of duty 4

[superior1]

i got a evga 460gtx 768 ram , when i got it it alyed all my call of duty games, call of duty 4 and modern warfare 2 very well , even at 1600 by 900, now all of a sudden i try to play either game as soon as i try to start the games , i get aritifacts , purple lines etc.... i updated my drivers and still nothing, i tried putting windows xp at 800 by 600 then starting the game , same result.
Anyone know what to do? Is it the videocard? Just got it a couple of weeks ago. thank you for your help.

amd 3700
evga 460 gtx
4 gig ram

 

[ern88]

My question is. Have you O/C'd your Video card??? If you have I would drop it down to factory. If you haven't. the card may be defective and you might want to RMA it. If you have a friend. Maybe try the card in his system. Plus are you running the latest drivers.

 

[Herr_Koos]

Agreed. If the card has not been overclocked, and you still get artefacts, get it replaced.