Low core speed

Hello. a few days ago I bought the ASRock AB350M Pro4 motherboard and the Ryzen 1600 processor.

Immediately updated the BIOS to the latest version (3.10).

But when I ran the computer, I ran into a problem.

The processor frequency does not rise above 1546 MHz. The multiplier is 15.5, respectively.

I tried reset BIOS settings, tried to roll back to an earlier BIOS version, turned on / off CPU and RAM overclocking. None of this helped.

I tried to use the advice from the video https://www.youtube.com/watch?v=jIPIbl81x-Q

Tried some other options, which right now I do not remember. What else can I do? I already despaired and I sit on the problem for two days.

Or, perhaps, ASRock knows about such a problem and in the near future there will be an update?

P.S. sorry for the mistakes, English is not my native language

in BIOS the processor frequency is displayed correctly, for example, 3200. But when the computer is already on, the frequency is unchanged - 1546 MHz. This frequency is in both idle time and when I do stress tests. Regardless of whether I am overclocking the processor. This is very bad. As a result even the processor on my old laptop is ultimately more powerful...