Yes, the 5800x is compatible with a B450M Pro Max.
Yes, the 5800x is compatible with a B450M Pro Max.
I'm preparing to switch from a 2600x to a 5800x CPU and checking if they work together. The motherboard model you mentioned is MSI B450-A PRO MAX ATX AM4.
Yes, it needs BIOS version 7B86vMC or higher to function properly. The BIOS version 7B86vMC was launched on February 8, 2021. You can upgrade your BIOS to match your 2600x before installing the 5800x CPU on your motherboard. Also, you can visit your BIOS settings in the top left corner to verify the current version. If you need assistance with the update or have questions, I’m here to help.
The latest information comes from their official site: https://www.msi.com/Motherboard/B450-A-P...upport#cpu