AMD to support Zen3 on B450 and X470 motherboards - VideoCardz.com
Asus to offer updated range of AMD B450 motherboards in Oct - Mainboard - News - HEXUS.net
Amazon.com: MSI B450 TOMAHAWK MAX II Gaming Motherboard (AMD Ryzen 3000 3rd gen ryzen AM4, DDR4, M.2, USB 3.2 Gen 1, HDMI, ATX)
B450 AM4 Motherboard For Ryzen 5 3600 cpus Asus PRIME B450M- A Motherboard DDR4 128GB AMD B450 PCI-E 3.0 M.2 USB3.1Micro ATX - AliExpress
Amazon.com: MSI Performance Gaming AMD Ryzen 1st, 2nd, and 3rd Gen AM4 M.2 USB 3.2 Gen 2 DDR4 HDMI Display Port Wi-Fi ATX Motherboard (B450 Gaming PRO Carbon MAX WiFi) : Everything