So I've got a 2.0 GHz, white MacBook with 1gb ram, and a G4 Powerbook 1.67 with 1gb of ram. The major software difference between the two is the OS, the MacBook is running Leopard. So, I noticed the MacBook started to lag a little from when it was new, so when I upgraded to Leopard I did a clean install. Still noticed the lag so I checked my ram, and here's what I got: The Powerbook was running the same exact apps (iTunes, iChat, iPhoto, Safari) as the MacBook, and even after loading dashboard on the Powerbook it still used only 500mb of ram and 4.45gb of Virtual Ram. The MacBook was using 615mb of ram and 32 GB OF VIRTUAL MEMORY?!? Wtf? I thought it might just be counting space set aside, but I checked the apps and adding all them up is about 32gb. They both have the same iPhoto library yet the powerbook's only took up 240mb of virtual ram and the macbook's over 1000mb. I realize there are some slight differences (different iChat, spaces was running) but why in gods name would it make the MacBook use almost 7 times the amount of virtual ram! Help!