Adding: I looked it up and Feynman quotes 10^8 times as much energy dissipated per step as the Van Neumann-Landauer limit when using the transistors of his era

Adding: I looked it up and Feynman quotes 10^8 times as much energy dissipated per step as the Van Neumann-Landauer limit when using the transistors of his era (1984-86 is when he taught the course).