thatwendigo said:Those "speed bumps" have also included at least three changes in processor - 7455 to 7457 to 7447A. The first two are pin-compatible, but I've heard some mutterings that the last is not compatible with the others and would require a new pin-out for the socket and minor revisions to the motherboard.
Oh, and I'm one of those people who does expect the G4 to "keep getting faster," because the core is about to be the basis for a new processor. The FreeScale e600 is a G4-based design with on-die memory controller, 400mhz FSB, low power consumption, and a clockrate that should be introduced around 2.0ghz at a mere 17 watts peak. The dual-core version adds a second logical core, and only 8 more watts, for a dual 2.0ghz chip at 25 watts peak expenditure.
That is what I want in the PowerBook.
A. The last chip revision was from 7447 to 7447A, and yes, they are pin compatible.
B. Steve Jobs himself has said that Apple is working on fitting a G5 into the PowerBooks. (I'm too lazy to find the link but it's on this site somewhere.) And no, Steve wasn't being cute when he talked of a G5, i.e. he's not thinking some future Freescale chip a "G5." The G5 is going into the PowerBook. It's just a matter of time, and of which flavor--970fx is the most likely but Apple-IBM may have something completely new up its sleeve.