How macOS can not only regulate CPU cluster frequencies to control power use, but also moves threads to E cores. This reduces power use of over 50 W to less than 13 W.
performance
Which versions of macOS can run in a VM? Can they run Intel apps too, and Intel macOS? How well do they perform? Can they access iCloud and run App Store apps?
Provides maximum frequencies for E and P cores in each of the M-series, a table of all frequency steps used by current M-series chips, and explanation of how they have come about and their importance.
In any M-series family, I’ve always assumed that P and E cores were the same, whether it’s a base or Ultra variant. That isn’t correct, though.
Low Power mode operates pre-emptive control of CPU core frequency to deliver the best compromise between low power use and performance. Here’s how it does so.
How CPU P cores have a frequency limit applied in Low Power mode, and how macOS regulates power use or temperature by controlling core frequency.
How Apple silicon CPUs control core frequencies and power use when running in Low Power mode. Includes M4 Pro and M3 Pro data, and estimates of energy requirements.
Apple refers to Energy Modes and Power Modes, and despite older MacBook Pro models offering Low Power mode, tells us that isn’t what Low Power mode is now. Here are the observations and explanations.
Does your NAS need faster storage or a faster network? If you were to improve those, would throttling limit the performance of backups?
It’s well known that writing Time Machine backups to storage is throttled to slow them down. What’s the point of using faster SSDs that are more expensive if macOS stops them from being fast
The Eclectic Light Company 