MSI are ready to support Ryzen 5000/4000 series processors for AMD 500, 400, and 300-series Motherboards
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Intel Kaby Lake Processors Get Full BIOS Support on MSI 100-Series
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Alleged MSI tech support email states older 300-series motherboards won't support AMD Ryzen 3000 processors - NotebookCheck.net News
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CES 2022: MSI Releases Four MAG B660M Mortar Motherboards
MSI MPG X570S Carbon EK X review: A motherboard for water-cooling enthusiasts | PCWorld