So it appears that my recently purchased Blackbook (May of this year) is already slightly outdated--curses! The new 'books have the slightly faster processor and can address 4 gigs of system memory. Thanks Apple! Anyway, I've been planning a memory upgrade for some time. I've got the standard 1GB/512x2 sticks that came with it, but I want to max out the memory in this thing. This generation of Macbooks can only address 3GB of memory (why, exactly? if Apple is so bout it bout it with the matched pairs, why limit the machine to a maximum amount of memory that cannot be matched!?). I can buy a 3GB upgrade kit (1GB stick and a 2GB stick) for relatively cheap; the 2GB upgrade kit (matched pair) is only like twenty dollars less. So here's my question: is the performance deficit brought on by using a mismatched pair even noticeable? Or do the benefits of that extra gig of memory outweigh whatever slight speed advantage there might be in have the matched pair? OWC's website makes the very convincing argument that there are more benefits to having the extra gig and the mismatched pair doesn't make a noticeable difference (http://eshop.macsales.com/Reviews/Framework.cfm?page=/Tips/macbookcore23gb/macbookcore23gb.html). Then again, they're also trying to sell me the most RAM possible. Apparently the only noticeable loss in performance is in the graphic end of things... I don't game much, but I do play a little WoW now and then, and I'd rather the video performance not get any worse than it already is. So: do I save the twenty bucks and get the matched pair, rather than sacrifice what is apparently a very small amount of video performance? Or do I buy the whole 3GB to max out and never have to worry about another upgrade?