Magnetic Microprocessors Could Enable the Most Efficient Computers Physically
Possible:
"Electron-free magnetic microprocessors would use 1 million times less energy per
flop than today’s computers, according to researchers at the University of
California-Berkeley. They would be so efficient, they would consume the least
amount of energy allowed by the second law of thermodynamics."
See:
http://www.popsci.com/technology/art...days-computers