ASRock seems to support new AMD Ryzen 3000 chips for its A320 motherboards
AMD Ryzen 4000 desktop CPUs will only work on 500-series motherboards | Windows Central
Alleged MSI tech support email states older 300-series motherboards won't support AMD Ryzen 3000 processors - NotebookCheck.net News
AMD Budget-Aimed A520 mATX & Mini-ITX Motherboards From ASRock Leak Out, Designed For Budget Ryzen 3000 & Ryzen 4000 CPUs
X470, B450, X370 Motherboards with BIOS Flashback/Ryzen 3000 Ready
AMD Ryzen 3000 questions answered: Compatible motherboards, Intel comparison, streaming, gaming, and more - Newegg Insider
Biostar News ::IPC Manufacturing, Industrial PC Motherboard Manufacturers - BIOSTAR
Biostar publishes list of 3rd Gen Ryzen-compatible motherboards and reveals "AMD Ryzen 3000 Desktop Ready" logo in the process - NotebookCheck.net News
Amazon.com: MSI Performance Gaming AMD Ryzen 2ND and 3rd Gen AM4 M.2 USB 3 DDR4 DVI HDMI Crossfire ATX Motherboard (B450 GAMING PLUS Max) : Electronics
AMD's X570 chipset won't support first-generation Ryzen | TechSpot