I have a Gigabyte p35-Qd6 4Gig ram Q9550 and two 5850 in crossfire. I can only play about 5mins with crossfire enabled and then crashes the game without fail. Just bought a new Billon 7800n and a 900watt pwr supply and bugger me it still does it.
Am sure they are not getting hot, I have the Antec 9 case with two 120mm fans on the front, One at the rear another 120mm on the side, cause I too thought they might get hot as well I also have the monster 190mm fan on top of the box too. I am running both cross fire ribbon cables though, although that’s what the manual states. Lastly have routed all cables neatly away as much as possible without disturbing the airflow.
Is anything overclocked? If yes, there's a very good chance that's the issue. I had to retest my system very thoroughly after BF3 crashed several times before finally seeing a slight memory issue. Fixed that, never crashed again.
And I'm also running CF 5850s, BF3 runs great at Very High 2xMSAA 1920x1080
Thanks for all the suggestions. Have had both cards out swapped them and also now only running one crossover ribbon, more on that in a sec. I removed all drivers and now have the latest drivers 8.981.2.0 & catalyst program and the crossfire add on too, out couple of days ago.
I have used Fur Mark 1.9 and get all the specs, core725mhz and mem1000mhz on both and good results scire 4300 with only one ribbon connected even though the manual states two and only get a score of 2900 when both ribbons are on. weird
when crossfire is off, BF3 works great but with it on only last about 2-3mins in game?