So I have a copy of halo 2 pc and a dual core computer running at 1.65 ghz with 6320m gpu(ATI). The gpu has 384 megabytes of ram dedicated to it im pretty sure(checked with CPU-Z and Tech GPU-Z) Now if i try to go to high on my computer I get lag which I dont get since I pretty much exceed the requirements. I am also running Windows 7.