GIGABYTE B550M K AM4 AMD B550 Micro-ATX Motherboard with Dual M.2, SATA 6Gb/s, USB 3.2 Gen 1, Realtek GbE LAN, PCIe 4.0 - Newegg.com
ATX vs Micro ATX vs Mini ITX - Which One Should You Choose? - ElectronicsHub
Will it look weird to have a microATX board in an ATX mid-tower case? - Quora
MSI PRO B650M-A WIFI AM5 Micro-ATX Motherboard B650MAWIFI B&H
ASUS Prime B650M-A AX AMD B650(Ryzen 7000) Micro-ATX motherboard(DDR5, PCIe 5.0 M.2 support, 2.5Gb Ethernet, Wi-Fi 6, DisplayPort, HDMI ,USB 3.2 Gen 2 ports, front USB 3.2 Gen 1 Type-C) - Newegg.com
Amazon.com: JONSBO D30 Black Mini Micro ATX Tower Computer Case, Aluminum Panel, Glass Side Windows,Simplicity MATX case,240 Liquid Cooling & 168mm Air Cooling, 355mm gpu Support,Black pc case : Electronics