Going to 45nm will GREATLY reduce power consumption compared to the 65nm parts that are soon to be released, and extremely compared to existing 90nm products. A very simplistic estimate would be that power consumption will drop by a factor of four (square of the difference of feature size) compared to the 90nm process, so a Prescott re-done in 45nm might only generate 25W-30W of heat. Now a Pentium-M derived core would obviously generate even less heat - dare we hope for 5W or less?
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