In that case, the only other variable is the fact that the G3/500 is a copper one, though I don't remember if that introduced any performance enhancements, per se.

Based on what I'm seeing... at the same clock speed, the G4 should be mostly the same speed at non-AltiVec instructions (definately not slower, probably a bit faster on some operations). Since I wasn't unhappy at 400mhz with the stock G3, I think I should actually be fine with the G4.

Hopefully, it will arrive before I leave for the inlaws in CA.

John