Happens or not I couldn't care less, I passionately dislike RPG/MMORG/strategy/etc games, 480 sucks, 5970 5870 sucks everything sucks.
The truth is, SC2's engine sucks balls.
There's nothing in those games to justify the graphics card stress and the CPU under-utilization.

I wonder why you guys buy those games when they're outright... sub-par products in term of engine work.