[math-fun] fair Carlsen vs Stockfish comparison

How do Carlsen and a laptop running Stockfish compare, when power consumption is used to level the playing field? Both the brain and a laptop use roughly 20W, but while most of that 20W can go toward computing the best move on the laptop (dimmed display, etc.), my guess is that only a small fraction of that is used by the brain for the same task (we can’t shut down all those processes required to keep us alive). Does anyone have an estimate of “higher-order brain function” energy consumption, and whether Stockfish would still be competitive with *that* energy budget? -Veit