I read this at thinksecret.com
Steve Jobs has very ambitious plans for Apple's processor strategy. He recently said "We've been stuck with the G4 for over two years, that's too long". His intentions are that the G5 have a life of 18 months in the Pro models. He wants the G6 to hit initial silicon between next December, and February 2003, and release it in mid-2003. Initially, the G6 will be fabbed with a 0.1 micron process moving to .07(.065) micron. It will be built upon the HIP 8.0 process, which is still not quite finalized. It will feature Altivec II, which promises to at least double performance of the current Altivec. Early estimates are that it will contain over 100 million gates. The G6 will be introduced at between 4.5 and 5Ghz and scale up to 10 Ghz.
This week Apple has committed itself to going beyond the G6 to build a G7, and maybe beyond. Apple is looking at Motorola's recently announced Gallium Arsenide technology to give this chip insanely high clock speeds. Talk is the G7 could go as high as 20 Ghz. The G7 would debut in early to mid 2005. This renewed hope with the PowerPc architecture is in light of the fact that Cisco Systems has committed to being a significant customer of G5's for their high-end routers, and Silicon Graphics being in the last stages of abandoning development on its R16000 and R18000 processors as a cost-cutting measure. It looks very likely it will sign a commitment with Apple, IBM and Motorola within a month. It has prototype G5 chips in a prototype workstation of theirs, and is hard at work developing Irix 7.0 for the G5.