Well after playing this game for the last few days and managing Prime95 stability I still had random BSODs using a multitude of Bioses. I started playing with LinX and for the life of me couldn't get it stable. So in the process of troubleshooting I removed everything from the board and started adding things back slowly. I've found the issue. I use a GTX 280 (water cooled) as my main GPU and an EVGA 9600GT for dedicated PhysX. As soon as I put the second GPU in either slot 2 or 3 I lost LinX stability and would experience random BSOD's. Its not the card as I had no issues on my P5K-E with all the same hardware. Its a problem with the board having 2 x GPUs installed.

Now the first thing, it's an open box from Newegg so it's entirely possible its just a bad board. I have ordered a NIB Gigabyte GA-EP45-UD3P that will be here Tuesday from Newegg. In the meantime I pulled the board removed the SB and NB and re-applied some decent TIM. The board seems better but still as soon as the second GPU is install LinX will fail. At the same settings or if I bump voltages it still fails.

So how many people here are using 2 GPUS? Crossfire or for PhysX and has it limited your overclock or affected stability in any way?

Thanks!