flahiker said:All I can think is that if these are the new COOLER 90nm chips and they require some bad a$$ liquid cooling to keep them from melting into a heap of molten slag.... it will be a VERY long time before they make it into a powerbook!
I would have thought that the move to a 90-nanometer process would have offset the 0.5 GHz boost in clock speed, so that the dual 2.5 could continue to use the G5's elaborate multi-fan air cooling system without the addition of a liquid-cooling bandaid.
In other words, it seems like there's an unexpected heat problem ... more watts from the 90-nm chip than anticipated.
That may be a clue as to why this update took so long ... and why the high end is 2.5 GHz instead of 3.0 GHz.
The positive spin is that the liquid cooling system provides the mechanical foundation for ramping up clock speeds in the future. But excess heat in a chip with densely-packed 90-nm components sounds like a daunting issue.