CPU fan speed

[biton161]

Hi all,
My hackintosh is based on GA-H77N-WIFI with i5 3570k (no OC).
I have it set up as dual Sierra/Win10 setup.
On win10 the cpu speed on idle is around 1400rpm.
For some reason in Sierra, under the same conditions, fan speed is only 930-950rpm, and as such the core temps are 3-5 degrees higher.
I cannot get fan control to work under HWMonitor or other software. Fan speed is automatically adjusted but lower than on Win10.
Fan is connected to the m/b CPU_FAN header and BIOS setting is on NORMAL.
Any ideas why this is happening?

 

[biton161]

Bit more info:
I'm using FakeSMC along with the sensor kexts in CLOVER/KEXTS/OTHER. No files in S/L/E.
I can read all items and fan speeds in HWMonitor just fine, but I cannot control fan speed.
As said, CPU fan speed/core temp ratio seems different (lower) than on Win10.