graphics card overheating

[Schizo]

i have got 2x asus radeon 4850's in crossfire.

i play quite a few game's like cod4,lfd,killing floor ect..

i purchased nation red the other day and my card's over heat and restart my pc.

i can only play this for 5 mins max before it goes goes wrong,i can play any other game for hour's with out a single problem.

even when i use one card for nation red it goes up to 90 c and then restart's.

any idea what is causing this as i dont find nation red to be a hard game to run.

 

[Engram]

That's pretty odd! Are the cards overclocked?

 

[Orcvader]

Is enough air getting to the cards? Are the fans even increasing as it gets hotter?

 

[Shakeel]

whats the fan speed?

 

[Schizo]

That's pretty odd! Are the cards overclocked?

nope...standard

Is enough air getting to the cards? Are the fans even increasing as it gets hotter?

ive got a antec p190 case and a fan blowing through both cards

whats the fan speed?

fan speed is 100%

 

[Schizo]

any idea's people ?

just been on cod 4 for 45 mins and my temps on the gpu's was 85c max and cpu 42c.

i would have thought cod 4 was harder to run than nation red.

 

[BriT]

Checked for any dust build up?

 

[Schizo]

everything got a dusting 3 week's ago and they was not that bad anyway.

 

[Schizo]

i have decided to fit a after market cooler on my card's.

but dont have a clue what one will fit my card's.

any ideas please ocuk.