[no1lives4ever]

If your i9 16” throttles down to 1 or 1.4ghz, then most likely it is clogged with dust. Open the bottom cover and clean both the heat sink and the Fan blades properly. I need to do this to my 16” i9 once every 3-4 months to prevent it from throttling under load.

Interestingly, sharing an external screen using google meet and running something like npm install will easily throttle the CPU even if the CPU usage never shows anything above 15% of use.