Hi Yesterday I upped the RAM in my TiBook from 768MB to 1GB. I didn't think it would make too much of a difference, but after using it today it really has helped alot. I am running Leopard on it, and it is so much more responsive. So for anyone pondering whether it is worth it - I would definitely say go for it - as long as you can get them cheap enough. Simon --- Visit my Mac site at http://www.simonroyal.co.uk. Or Skype me on 'Simon-Royal'. (Apple PowerBook G4 867Mhz, 1GB RAM, 80GB HD, SuperDrive. Mac OSX 10.5, 10.4 & 9.2.2...)