1 gig 460 or 768 ?
the memory bendwidth being different 256 bit on the 1 gig, 192 bit on the 768
i think the 768 would not be bottlenecked at all, and the 1 gig might be slightly (nothign a small overclock wouldn't fix though) also the bottleneck would be slight and onyl effec tperformance by a small margin really you're good with either card