ASUS TUF Z390 - i7-9700k -iGPU: speed step does not work

[facq]

Hello all,

First of all, thank you to all the people who are providing help and answers on this forum.
Thanks to you, I had my first build up and running Catalina 10.15.3.

Unfortunately, I cannot get the speed stepping working.
After boot up, frequency is stuck to 800MHz (lowest ratio).
After waking up from sleep, frequency jumps to 3.6GHz and stays there.
Utilization is always close to 100%

I attach my config.plist and the output of AppleIntelInfo.kext

Any feedback would be greatly appreciated!

 

[telepati]

Follow this guide;

MacMan's Build: ASUS TUF Z390-PRO GAMING - i9-9900K - Vega 64 - Updated for 10.14.6 and NVRAM Support

MacMan's Build: ASUS TUF Z390-PRO GAMING - i9-9900K - UHD 630 Updated 2020-02-02 for Native NVRAM Support Components ASUS TUF Z390-PRO GAMING Motherboard https://www.amazon.com/dp/B07HM6ZC9D/tag=tonymacx86com-20 https://www.newegg.com/Product/Product.aspx?Item=N82E16813119160 Intel...

www.tonymacx86.com

 

[facq]

Thanks.

I went through the guide but I could not find an answer to my problem.
Any hints why the speed stepping would not work?
BIOS issue?
or kext patching issue?

Any suggestion is welcome!

 

[facq]

Any hint?