Thanks again for your detailed answer.
I'm still thinking on one thing.
How the Intel 12th gen is not affected? Can you check the timers on those platform? Are they used by the Defender?
Thank you for your explanation but there are still some parts that I don't understand.
I get the same bad result without starting the HwInfo at all (after a fresh restart). So it looks the Defender can cause some problems in itself for me. Or is there some other hidden monitoring programs that...
I have the same issue with Antimalware Service Executable on Windows 10. ThrottleStop 9.3 is the last version that properly throttles the MS Defender as well.
If you need some logs, I can provide them.
9.3 vs 9.3.1