Sorry for this question, probably a bit silly, but I just want to make sure... I bought an MP few months ago -some jobs couldn't wait... This forum was a great deal of help in making the decision, I got a nice deal and am extremely happy with the machine. I refused to buy it new -to see it now outdated. And I got a smashing deal as I said, Quad 2'66-1TB HD-4x2 Gb RAM. Now I wonder if I will be able to use all or part of this 8 Gb RAM in the new MP. I presume not, at least not reliably... Can anyone confirm this ? And if someone is in a generous mode, could s/he explain whether the use of this RAM in the old machine would improve under Leopard ? (I'm still running the latest 10.4) Thanks to everyone, especially Multimedia and Sdave.