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jacob_cannell comments on Steelmaning AI risk critiques - Less Wrong Discussion
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A 100kT signal Is only reliable for a distance of a few nanometers. The energy cost is all in pushing signals through wires. So the synapse signal is a million times larger than 100kT to cross a distance of around 1 mm or so, which works out to 10^-13 J per synaptic event. Thus 10 watts for 10^14 synapses and a 1 hz rate. For a 100 hz rate, the average dist would need to be less.