I've got the same programs open on my G4 Tower and my iBook right now. iTunes, iChat, MSN Messenger, Firefox, Textedit, Preview, Quicktime 7 Pro, Activity Moniter. The G4 has 1.75GB of ram, and the iBook has 384mb. There is 1.15GB free on the G4 and 32.75mb free on the iBook. The more ram you have, the more it uses. I can easily have all the programs I have open on my tower, open on my iBook, even though theres "not enough ram". How do you explain this?