Unable to change DRAM frequency at all

MB: b450m steel legend
CPU r5 2600x

Initially I was using bios 2.10 and everything was just fine.
Then I tryied to update bios version to the latest for pinnacle ridge (2.50) and Ive got a bug when I cant change 3pin fan speed at all - it was always on 100% (dc mode, silent/any mode, curve with 0% always and etc), same in the windows with A-tuning and speedfan.

Because it is extremelly critical for me (I am using 5 powerfull fans and all of them at 100% are generating a lot of noise) so I decided to downgrade it back to 2.10

I just flashed 2.10 with instant flash - and fans now woking as it was before.

BUT a new issue came up, now I cant change dram frequency and timing at all - it is just not setting.
This is the steps that I follow:
1. resetting bios & reboot
2. setting the dram freq to 2133/2666/4000/anything except default 2400
3. F10 => reboot
4. now in bios it says dram freq still 2400 but the selection is saved, it is 2133/2866/4000 that I set before.

The same thing with timings.

Then I tryied to change dram freq from amd ryzen master and it works - I can set 2866 (that I had before the bios update and downgrade stuff) but if I try to change it from bios and for example to set it to 4000 - just the same thing above happend - after F10 it says I have selected 4000 but 2866 is actual.

I dont want to try to set freq to any higher because if system will fail I will not be able to change it from bios because windows will not load.

Kingston KHX3000C15D4/8GX
Yep, a typo, and also do not stick to the freq itself, I tryied everything in list except default 2400 - no changes.

I am not mixing it, I installed ryzen master as a last experiment because I wanted to know if it is still posible to change freq from windows.

I tryied to reset to factory/remove battery for a 2mins but none of it is working, the freq is still 2400 no matter what I am using (please note that the bios is saving, all other options work, dram freq selector is also saved but actual freq after F10 is not)

Thanks a lot!

Ray62 wrote: Did you do the 2.10 -> 2.00 -> 2.10 flashing steps?

Yep, and it is fixed now! Thanks again man.