The AGP aperature size sets the maximum amount of allocatable system memory to be used as video memory. Most likely hardly any of this memory will actually be used, as there are hardly any games/benchmarks that use more than 128mb of video ram. However, like a windows page file, there is always SOME data on there, it's neccessary.
Everything I have read says that 128 is the setting with the best performance. Why I'm not exactly sure, as it won't all be allocated anyways.
Me: are you saying I can't provide?
Me: cause I know I can provide.
Me: oh and I can provide money too;)
Rachel:): why do we need money when we can just stay in our room and have sex all day?