That would make the G4 400 equivalent to a G3 480. But we got a G3 600 here. I would vote for the G3 600. My ibooks runs surprisingly fast when even compared to my G4 1ghz tibook.Viro said:The G4's are going to be faster than the G3 even in number crunching. The G4 sports some nifty ooptimizations in the FPU that allows it to shave off 1 cycle for each floating point operation, compared to the G3. This roughly translates to a 20% increase in efficiency.