Question Ryzen 9 3900X CPU fan stops working after 20 minutes

Dec 30, 2020
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I have very peculiar problem with my build. CPU fan stops working after about 20 minutes at the same time RGB lights on the fan blink few times and go off. Fan is not starting with increasing CPU temp. After computer restart same situation in 20 minutes.
I replaced fan but problem persist. I updated BIOS and chipset without improvement.
My components:
Asus Tuf gaming x570 plus wi-fi
Ryzen 9 3900X with wraith prizm fan
MSI RX 570 4GB

Does this indicate problem with board or CPU ?
Thanks
 

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