I currently have this: OCZ Premier Dual Channel 1GB (2 x 512MB) 184-Pin DDR SDRAM Unbuffered DDR 400 (PC 3200) System Memory 2.5-3-3-7 And I've been told by a few people that 2 GB of memory would really benefit certain games like Oblivion and BF2. I'm confused as to how I would upgrade the memory if I decided to. Would I be better off to get 2 more 512 mb sticks, or replace it with 2 1Gb sticks (I could find a home for the old stuff )or does it matter at all? If I was to just add 2 more 512 mb sticks, would it be better to get the same memory I have, or faster memory? Is my memory a decent speed? Sorry, memory has always confused me a little bit and I have a lot of questions about it. Thank you for your help!