This Microsoft help thread is extremely relevant and a good reason not to invest money into your system: http://answers.microsoft.com/en-us/...7-32-bit/4286bbfa-6851-e011-8dfc-68b599b31bf5 Basically 4GB is the maximum amount of RAM that your system can address which includes RAM on your video card. I'd wager that for $300 you could find a computer or laptop that could last you 2 years of gaming and be superior to what you have. I have a ATI Radeon HD 5870 and the only problem I've encountered is having to update my drivers, which I try to do regularly anyway. Same problem as NVidia. I'd look at Tom's Hardware and use their comparisons for a basis for decisions, they do a pretty good job.