
The adult human brain is estimated to contain from 1014 to 5 × 1014 (100–500 trillion) synapses. We might count the number of synapses, guess their speed of operation, and determine synapse operations per second. There are roughly 1015 synapses operating at about 10 impulses/second, giving roughly 1016 synapse operations per second.
All are potential thoughts within seconds, even milliseconds, with enough power.