Originally Posted by mastrdrver
I never had this problem about a year ago even with two cards. I did noticed that leaving AA down fixes most of it though larger maps like Heavy Metal still has problems.
I just hope it is not a problem in BF3 because I'm going to lose it then.
my guess is that its an in-game mechanism to reduce the memory footprint and reduce/prevent crashing when it hits the 2GB address space wall in 32 bit OS.
iirc, BF3 will be DX11 only - so they'll be able to optimise that codepath a lot better and fix things like this, should they choose to do so.