3950X Idle speed spiking

Discussion created by amerelium on Dec 18, 2019
Latest reply on Jan 2, 2020 by amerelium

Fresh system, 3950x CPU, X570 chipset (Asus TUF Gaming X-570 Plus), Windows 10 Pro, Noctua NH-D15 air cooler
At full load (Lightware 3D rendering), all the cores boost themselves to 3900-4000 GHz (and stay there constantly), with max temperature logged 74C - So there are no cooling issues here.

But here is the annoying thing: When the system is Idle, the cores keep bosting themselves to 4+ GHz every 10-15 seconds or so, with the accompanying fan speed-up. And when the system is otherwise completely silent, that constant pulsating noise becomes irritating quite fast.

There are no processes that  show more than 0,5% usage at a time, I have killed off most of the junk that come with Windows 10, including Defender.

Is there any way to stop this?