There's nothing inherently energy inefficient about silicon. Because of it's tiny scale computations can be done with just a few electrons. Compared to the enor

There's nothing inherently energy inefficient about silicon. Because of it's tiny scale computations can be done with just a few electrons. Compared to the enormous amount of chemical reactions every neuron in your brain needs to consume every cycle. Current computers are just optimized to be very energy efficient because electricity is so cheap. Also current computers are very general purpose while the brain isn't. It's like thinking the Atari was as fast as a modern computer, because it takes a modern computer running at multiple GHz to emulate it completely. Emulating the circuitry of another computer is just really expensive. Even just moving data from memory to the processor consumes a ton of memory that wouldn't be necessary in an ASIC. Or doing full 32 bit dense matrix operations when the real brain does very low precision sparse operations. I've read some optimistic estimates that we could make computers 10,000 times faster/more energy efficient if we just stopped caring about errors as much.