Q: Powermac G4 upgrade?

1.4 GHz if you can find one...

http://x704.net/bbs/viewtopic.php?f=8&t=7650&p=98833&hilit=electron+etch#p98833

There were a very few 1.6,1.8, & 2.0 GHz 7447/s, but can't remember if they worked in Sawtooths.

I bought a Sawtooth a few years ago with a dual 1.8ghz processor. Right now I'm using it in a Digital Audio with a SATA card

This article:

http://www.jcsenterprises.com/Japamacs_Page/Processors.html

shows a PowerLogix 2.0Ghz for a Sawtooth. That entire site is a gold mine for PPC owners. This is the start page:

http://www.jcsenterprises.com/Japamacs_Page/All_Things_PPC.html

It was written by a person who used to be a frequent contributor here.