MSI MPG B550 GAMING PLUS

Supports AMD Ryzen™ 5000 & 3000 Series desktop processors (not compatible with AMD Ryzen™ 5 3400G & Ryzen™ 3 3200G) and AMD Ryzen™ 4000 G-Series desktop processors
4x DDR4 memory slots, support up to 128GB
Supports 2-Way AMD CrossFire™ Technology
ATX Form Factor 12 in. x 9.6 in. (30.5 cm x 24.4 cm)

Full Product Details:
https://www.msi.com/Motherboard/MPG-B550-GAMING-PLUS