ASRock Confirms 400/500-Series Motherboard Support for AMD's Upcoming CPUs - eTeknix
AsRock Steel Legend B450M - does it worth upgrading to Ryzen 5000? : r/ ASRock
Asrock B450m Steel Legend Ryzen 5000 | 3d-mon.com
ASRock > B450 Pro4 R2.0
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