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I was wondering if anyone had some statistics about the average amount of energy that is lost on the process of propagation delay in moving a signal from one place on the CPU to another. I'd prefer statistics on modern CPUs, but I suppose any would be instructive.

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check this article, its references might lead you to what you are looking for: en.wikipedia.org/wiki/CPU_power_dissipation –  Shekhar Jul 15 '13 at 18:08
    
I used to have this sort of information to hand - it's some quantity of picojoules, with a very high variance; but what would you do with it? –  pjc50 Sep 2 '13 at 15:39

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