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#11
So turns out my fix wasn't so hot, but I have learned more. Mainly by going directly to Origin support. Their primary recommendation was to disable crossfire if it's enabled. Unfortunately that can't be done on a AMD 5970 card because it comes with two procs built on the board. So after continued trial and error I came to find stability by.... running in windowed mode rather than full screen. I just expand the screen out to get full screen but still have the windows frame. That change has given me the best stability so far.
The gist of Origin's advice was don't use SLI or Crossfire. My brother has a single GPU card, for him disabling windows Aero and bumping the per process virtual address space in windows made a big difference, but he still get's the occassional lockup when changing maps. For that I say go windowed mode.
Additionally, this post on tomshardware.com has some interesting insites.
Benchmark Results: AMD Graphics Cards, CrossFire : Battlefield 3 Performance: 30+ Graphics Cards, Benchmarked
The part about restarting after every resolution change might be a key. For whatever reason BF3 sucks balls on dual card/GPU setups. And apparently Origins take is that it's not supported in that configuration and they recommand disabling crossfire or SLI. They call it a hardware issue, I say it's bug in BF3 if it doesn't even support those technologies.
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