I have been wondering if the upgrade from 2gb to 3 is worth it. Well, this article answers that question. It is very hard to get any reliable info about this b/c I do not have enough money to waste on a 3gb stick of ram. According to Lifehacker- they see a significant performance increase. Not very scientific but it confirms that there is a very noticeable speed bump. Check it out for yourself. 2.33 MBP 1g/2gb/3gb speed test And for you naysayers, here is the counter argument, but pay special attention to "Dave" in the comments sections. He claims an 11% performance bump with or without matched pairs.