Taichi X370 Bios 4.60 Down Clocking

I'm back at it again on my Taichi X370/1700X system. I also have an ROG Hero VII/2700X system and the down clocking works as advertised on that system.

I just update the BIOS to P5.50
Set the BIOS to the defaults
Made sure everything was set to the standard defaults in OC Tweaker
Went to AMC CMS>Zen Common Options>Custom Pstate/Throttling>Accept>
Changed Pstate0 to Custom and set Pstate0 FID to 98
PState0 settings:
Frequency(mhz) 3800
Voltage(V) 1350000
Pstate0 FID 98
Pstate0 DID 8
Pstate0 VID 20

Pstate1..7 Auto

Went back to OC Tweaker and set the XMP to XMP2.0 Profile 1
Changed CPU Vcore Voltage to Offset Mode
Set the Offset to 0.00625
Changed the CPU and VDDCR_SOC LLC settings to Level 2

System runs at a fixed 3800 and the Vcore goes up and down based on system load. I cannot find the secret setting(s) that will allow this thing to down clock. I think I have tried every combination of Pstate settings and CPU frequencies and nothing changes when it comes to down clocking the CPU.

Help would be appreciated!!

Ken429 wrote: I tried not loading Ryzen Master and that had NO effect.  I never used Ryzen Master to try overclock settings so nothing was ever saved by Ryzen Master to override the Bios settings!  One more "that's my problem" eliminated. I also tried changing the OC to 3825 and that too had no effect. So...since prior to Bios 4.60 everything was working as advertised I have given up chasing smoke and hope that ASRock fixes the down clocking issue (at least for some of us) in Bios version 4.70.   In the meantime it is a minor issue since the voltage drops when the system is idle and the idle temperature is ~24C.  Don't know what is going on inside the CPU that could cause a problem running at 3875 @ ~.5 Vcore.  I wonder what the 2700X will do on this MB with the 4.60 Bios.

Ken429 wrote: I tried clearing the Bios again, loaded UEFI defaults and set the following: AMD CBS Setting Voltage Mode = Stable Mode CPU Core Voltage = Offset  Offset Voltage= .00625 CPU LLC = Level 2 SOC Voltage = Auto SOC LLC = Level 2 Pstate 0 = Custom 3875 1350000 9b 8 20 All other pstates at auto. I had the minmum power setting in the AMD Ryzen Power Plan set to 40%.  That worked several Bios's ago!!  I changed it to 50% as you suggested. Bottom line the system will not down clock but does drop the voltage when idle. I wonder what advantage there is down clocking since the system idles at 24C. Just an aside, it appears I have to go to into ASRock Settings to set the memory to Profile 1?! Any other suggestion on what I'm missing?

I tried clearing the Bios again, loaded UEFI defaults and set the following:

Looks like I have the same problem!