>Well Dan, I have a iBook with no future ahead of itself, so I think I may >see what's involved in unsoldering the chip to see how, in turn, i could >solder it to the mobo of my 2300c duo. These upgrades have been done >before, right? Unsoldering a 603 and soldering in a G3? I mean arent they >closely related to each other? I'll see if I can dig up some pinouts of >each CPU to see if they are the same. No chance of it working. The G3 is a BGA package while the 603 is in a quad flat package. You could design a custom board (I _think) that would reroute the signals, but it cant be worth the effort. Mad Dog