With that much ram there isn't much difference. But you can make a game use it. I have 512MB (I use Photoshop often), and I always adjust Unreal based games to use 128MB as cache. Its in the advanced options. Esp for Deus Ex and Wheel Of Time, this makes a HUGE difference. So with that extra 128MB, you could do the same, this would make things better for those games.