Different setups yield different results. Even with the same game, same settings... you'll get different memory usage on each machine. W_D is not as resource hungry as some make it out to be. It's badly coded, and poorly optimized... yes. But, it does not need 4gb of vram to run. Same as Wolf:TNO doesn't need it either, even though it can and will (for some) use over 3gb. Same with Crysis 3. FarCry 3... BioShock: Infinite. And tons upon tons of other games.