For irreversible computation, yup. If reversible computation turns out to be practical, things are a little weirder, and the bounds are... further away. Stuff

For irreversible computation, yup. If reversible computation turns out to be practical, things are a little weirder, and the bounds are... further away. Stuff like: https://en.wikipedia.org/wiki/Margolus%E2%80%93Levitin_theorem https://en.wikipedia.org/wiki/Margolus%E2%80%93Levitin_theor... https://en.wikipedia.org/wiki/Bremermann%27s_limit https://en.wikipedia.org/wiki/Bremermann%27s_limit The Landauer limit is dependent on temperature, though. If you fast forward the universe a little bit to let the CMB cool down, even irreversible computing can get pretty efficient in theory.