AMD Zen 3, Ryzen 4000-series CPUs will work on B450, X470 motherboards - ThinkComputers.org
B450 Vs B550: Which Chipset for Ryzen Zen 3 CPUs? - YouTube
AMD Zen 3 Will Not Work With B450 And Older Chipsets – Pokde.Net
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
AMD Ryzen 5000: ASRock bringt Zen 3 per BIOS-Update auf B450 - ComputerBase
B450 Zen 3 Compatibility: AMD Bow to Community Pressure | Play3r