In multigpu cards, that 2GB is mostly just the same texture memory mirrored for each one, so it behaves more like a 1GB card, although it's possible there are some optimizations to reduce memory usage.
I've been told my card is shipping this morning, when I get it, if no one else has stepped up to the plate, I'll settle once and for all if the memory bandwidth is what's holding the card back.
Bookmarks