I have a black 2.2ghz black macbook. I had 1gb of RAM and just bought 4gb of RAM from OtherWorldComputing and put it in today. After putting it in I bought and ran memtestosx. It did three tests and came up with no problems. I turned on my computer and upgraded to Leopard 10.5.2 and then did the graphics update as well. When I looked at istat pro I noticed that my wired memory went up to 550-600mb when it used to be in the 250-300mb range. Does adding more RAM increase the amount that becomes wired for the OS? Or did the Leopard update really just double what used to be required for my memory. Or is this an issue with my new RAM? I used to have 1gb and having open firefox, adium and thunderbird I would still have about 150-200mb of free ram, now with the same setup on 4gb I have 2.9gb free, so I used to be using about 800mb of RAM and now I'm using over a gig? Also I noticed that start up seems to take longer. Any help would be greatly appreciated. Thanks!