MSI B450 Tomahawk MAX II: The Ultimate AMD Ryzen 5000 Support Motherboard with PCIe 3.0 and Overclocking Support – Thunderz.in
AMD Ryzen 5000 Zen 3 support is rolling out for ASUS, ASRock, Biostar, Gigabyte and MSI 500 series motherboards; no B450 or X470 support until January 2021 at the earliest - NotebookCheck.net News
What B450 motherboard is compatible with Ryzen 5000? - Quora
MSI promises its AMD X470 and B450 motherboards will support Ryzen 5000 (Zen3) series - VideoCardz.com