ASROCK B550M PRO4
- Supports AMD AM4 Socket Ryzen™ 3000, 3000 G-Series, 4000 G-Series, 5000 and 5000 G-Series Desktop Processors*
- Max. capacity of system memory: 128GB
- Micro ATX Form Factor: 9.6-in x 9.6-in, 24.4 cm x 24.4 cm
- Graphics Output Options: HDMI, DisplayPort, D-Sub
- AMD CrossFireX™
https://www.asrock.com/mb/AMD/B550M%20Pro4/index.asp