Question Ryzen 5 2600 stock cooler weird fan curve

[smsm1996]

R 5 2600 cpu stock cooler fan curve is always at 75% (1600-1800)rpm at idle temperatures, the maximum rpm for the cooler is 2500 rpm , is there something wrong with the cooler or my bios ?
I use msi b450m mortar mother board, my power plan is Amd Ryzen Balanced

 

[Crosslhs82x2]

There are lots of possible reasons Why it is staying 1600-1800rpm
Such as dust in system, ambient room temp, lack of airflow through the case, improperly mounted heatsink/cpu cooler.

Since the recent series of win 10 1809 updates my ryzen balanced processor power management settings was changed.
Last week for grins and giggles I opened up ryzen master to see: all cores @4.24g @Idle and the edc readings in yellow.
The edc in yellow was 1 thing i had to look into when i upgraded.
That led my to the power plan.

So open up ryzen master see what going on note temp , what are your cores are doing.

Check the ryzen power plan
Processor power management Dbl click
3 fields open up
Click on min processor state set to 5%.
And cooling Active
Apply then ok.

This is the easiest to start with.