I've decided to post what I know about IBM's chip plans for the PPC and take some educated guesses as to how they relate to Apple. Firstly, let me tell you why I know what I know. I have three good friends in the upper echelon of IBM. Two are in tech development positions of some kind, the other is in management. One is in Colorado, another in New York, and the last in North Carolina. I've gotten agreeing chip information from two of them. The third works in tech that doesn't involve chip manufacture. #3 has heard rumors, but hasn't been to official meeting or seen official documents. Well, from what I understand, Apple came to IBM about two years ago requesting help because of Motorola's lack of interest in really building kick-butt processors for Apple. IBM agreed to help, although certain conditions were needed for this to happen. Most of this involved business related stuff and tech development costs, as well as some trade offs on technology developed by each company. So, everyone knows about the 970 now, but there is also development on a new 750 based chip. There is already a 750 ready to go that is Altivec (I know, Moto terminology, just easier to know what it is that way) enhanced, can run with a FSB @ 400 or 450 MHZ with speeds up to 2GHZ. This is a modified 750fx, for all intents and purposes. These have been available for several months now, but Apple has not wanted them until now. It had to do with Apple's contractual obligations to Moto and the fact that they toast the G4 chip. Apple is scheduled to have several palettes of these 750s (yes, up to 2 GHZ, lowest being 1.4) delivered to them in May. They also will have the 970s delivered to them @ speeds of 1.5 to 2.5. So, here's my educated guess: The 970s now actually run more efficiently than when specs were announced, so that a high-end laptop could take a chip running at 1.8. I'm not sure if Apple will keep them all at 1.5 for power efficiency, but they may. So, I think Apple introduces a completely revamped lineup in July. The iBooks and eMacs all use the 750 chip - iBooks running at 1.4, eMacs up to 2. The iMac may have a low-end model with this chip, and may be launched without the 970, giving the "Power" lineup a 3 to 6 month head start with the 970. I also don't think they'll call the 750 the G3. My bet is they may call it a Super G4 or a G4 Xtreme - something like that. I see the PowerMacs getting an assortment of 970s, up to 2.5 with dual processor combos possible. I think the 12" PB will get a 1.5 processor while the 15" PBs can get a 1.5 or 1.8 and the 17" comes with a 1.8 I think Apple may put 1MB of L3 on the 750 machines, 2MB on the PBs and PowerMacs. However, the PMs can take up to 4 - and it may be best for the laptops to only have 1. I also know IBM is working on a 32bit new 750 based processor for Apple, so my guess is this will be used to delineate the iBook and eMac from the Power lineup. It may extend to the iMac too, but I'd guess a high-end iMac would have the 970. And, now to the real kicker. Remember how I said that Apple had to make concessions to IBM? Well, one of them would allow IBM to manufacture and sell machines that ran Mac OS X - and would allow them sell it for servers, if a customer wanted it. This would not allow them to build laptops that ran the Mac OS, only desktop machines or servers.