GPU will be the prime factor, but 2 gigs of ram is Par these days, it's not the "ultimate" as was once believed.

For example, about a year ago, I had a similar system to my friend Dave. Only he had 2gig of ram and I had 1gig. The difference when playing BF2 was incredibly noticeable - and that was just a BF2, last gen. I really think people undermine the importance of ram and the demand the newer games are placing on System Resources.

[Linked Image]

[Linked Image from nodiatis.com]