The "T" class of Yonah chips, which are expected to be fitted in most business notebooks, will come with a maximum power consumption of between 25 and 49 watts. Right now, single-core Pentium Ms top out at 27 watts.If true, that's not entirely unexpected given that these chips have two complete and independent cores, but it is still disappointing. Historically, Apple has preferred CPUs with a max power utilization under 30 Watts. However, the specifications published by CNET indicate that dual-core 2+ GHz Yonah chips are far above that 30 Watt barrier.
It does make one wonder how Apple will deal with this issue. Will Apple will choose to use Intel's fastest and hottest Yonah chips in some PowerBook models, or will Apple choose to use only slower and/or low voltage (LV) chips to save power?
The DigiTimes echoes CNET's article, but goes on to suggest that these numbers are actual TDP values, and not absolute maximum power utilization values. (TDP is a better representation of what would be expected as an effective maximum with real-world software, but it is lower than the absolute maximum power utilization possible, with say a power virus.)