In a Notebookcheck test, they got the bottom plate up to 43C, and top plate near the screen up to 45C: https://www.notebookcheck.net/The-passively-cooled-M4-SoC

In a Notebookcheck test, they got the bottom plate up to 43C, and top plate near the screen up to 45C: https://www.notebookcheck.net/The-passively-cooled-M4-SoC-makes-the-competition-look-old-Apple-MacBook-Air-13-M4-base-model-review.1002534.0.html#c13214514 https://www.notebookcheck.net/The-passively-cooled-M4-SoC-ma...