Hi, I am looking to upgrade the stock 450MHz CPU in my G4 Cube and just acquired two G4 towers (Sawtooth and Quicksilver) with Sonnet cards. One is the Sonnet Encore/ST 1.4GHz (SG4-1400-2M) and the other the Sonnet/ST Duet Dual 1.8GHz (SG4D-1800). Neither are specifically designed for the G4...