I'm possibly interested in upgrading the CPU in my Sawtooth (500mhz now).

I don't want to buy one of the 3rd party upgrade cards -- I'd prefer to buy a stock CPU that was pulled when it's original machine was upgraded or parted out for price reasons.

My question is, since the Sawtooths max'ed out at 500mhz (from what I can tell), which processors from the newer models of PowerMac G4s can I use?

Thanks