so it is only 2.5gb thanks buddy ,but is it the full consumption of it or its need more for battlefield 3 ?? i mean of the game needs 3gb of consumption its use just 1.5 because i have 3.5gb ??
Yes, one has twice as much video RAM as the other. They will perform mostly the same but the 1024 will work better at higher resolutions or with more graphics setting turned on than the 512.