It doesn't just appear to, it actually does.fruitoftheloom wrote: ↑Mon Dec 23, 2019 12:01 pmStanding the RPi on its side and running a fully updated Raspbian Buster OS, appears to lower temps:
https://www.seeedstudio.com/blog/2019/1 ... than-ever/
See here for the software change. https://www.raspberrypi.org/documentati ... agement.md
The board on its side means increased air flow over both sides of the board as the hot air convects upwards. Flat on the desk, air gets trapped underneath, meaning the underside of the board get warmer.
Also, because of the orientation of the SoC, the electrons in it flow downhill, using gravity, so they use less power to get to the bottom of the chip. Less power == less energy used. Since the power socket it now on the top of the board, the electrons fall out the bottom of the SoC and are continually replaced by fresh ones from the power in, and of course, fresh electrons are more efficient.