Right, just went to boot up COD4, and when I was at the profile select page, I could see flickering red dots whizzing about. Kind of weird. Any ideas as to what it could be? I solved the problem last time by updating the drivers, but seeing as the 9.5 aren't out yet, I can't. And it didn't seem to solve it in the long run. I think it could be the PSU, but when CPC did a test on the same PSU as me, they said it ran absolutely fine, that was with a quad installed as well as the 2 cards.

Specs:
C2D E8400 @ 3.6Ghz
4Gb Corsair Dominator PC2-8500
DFI LT-X48 T2R
2x 512mb 4870
Coolermaster RealPower M700 PSU

Cheers.

try turning one card off... see if it still does it...

then try the same on the other card...

the last time i had something like that happen the card bit the dust not long after...

Better not!! Lol, voided the warranty as well....bug*er......I'll give it a shot.

Hmmm, well, I switched the cards around, re-installed drivers, and few presto, works!

Stupid computers.