MSI Confirms AMD Ryzen 4000 'Zen 3' Support On 400-Series Boards
Biostar publishes list of 3rd Gen Ryzen-compatible motherboards and reveals "AMD Ryzen 3000 Desktop Ready" logo in the process - NotebookCheck.net News
ASRock > A520M-HDV
AMD Chipset Comparison: B550 Specs vs. X570, B450, X370, & Zen 3 Support (2020) | GamersNexus
Amazon.com: ASUS Prime B550-PLUS AMD AM4 Zen 3 Ryzen 5000 & 3rd Gen Ryzen ATX Motherboard (PCIe 4.0, ECC Memory, 1Gb LAN, HDMI 2.1, DisPlayPort 1.2 (4K@60HZ), Addressable Gen 2 RGB Header
Not All AM4 Motherboards May Support 3rd-Gen AMD Ryzen CPUs | Extremetech
B550 VISION D-P (rev. 1.x) Key Features | Motherboard - GIGABYTE Global