I am currently running a 2002 Duel 1 ghz Quicksilver and I have a AGP 400 Sawtooth I want to set up for my friend for his first mac. What is the fastest Apple cpu that will work in the sawtooth? In 2005 I upgraded a Sawtooth to 1.53ghz from fastmac.com for $150.I was forced to sell that machine a few years ago. The upgrade cpu's have become to expensive now they are $250 but I noticed the work for both my machines. Does that mean I can get a Duel 1 ghz possessor from a Quicksilver off ebay and run it in the Sawtooth? We are both musicians and He needs a stable machine to record and bounce files back and forth not necessarily surf the web. I'm gonna buy a mini as soon as i get the cash for that. Thanx any help will do for us starving artist.