Hey there,
in my rig, i have three XFX 5870s on a MSI P7N Diamond. Running fine for three weeks now. But I have to admit, it's inside an old bigtower case with a couple of fans in the side panel and a 120mm fan in the Front thats blowing out hot air. Board is 100% stable though.
In my work PC, I recently had problems with my mainboard too. My 5 year old Intel DG956WH became unstable and finally broke, i think the northbridge heated up to much by the single 5870 directly beneath it. Now I bought a cheap Asrock P5B-DE, because I just got my Q6600 Intel quadcore some weeks ago, and didnt wanna go all the way to buy new processor, DDR3 memory and so on.... As a precaution I although installed two 120mm fans in the case. Hope the board will last another 5 years now
