It really is just a problem with the unreal engine. alot of games based on the unreal III engine have that problem, mainly gears of war. Personally I think that it has to do with the textures becoming so large and simply taking longer to load even crysis warhead has that issue. Not anything you really can do about it. My system has 8GB of ram, a q6600 and 2 velociraptors in raid 0. I still have that issue.