if the game takes up a lot of RAM, and the total RAM used is more than 512MB, you're using a paging file which will slow down the game. in this case an upgrade of RAM would increase the performance, otherwise it would just depend on whether you run dual channel; I think some s754 motherboards can run dual channel even though the CPU hasn't got a dual channel controller like the 939's and 940's, because the motherboard can be made with one