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Question Do I need to bios update the msi a320 a pro max motherboard for it to be ompatible with the ryzen 3 3200g?

From the manual:
Supports 1st, 2nd and 3rd Gen AMD® Ryzen™, Ryzen™ with Radeon™ Vega Graphics, 2nd Gen AMD® Ryzen™ with Radeon™ Graphics, Athlon™ with Radeon™ Vega Graphics,
I'm not an AMD fan and have no idea about generations, but you should do, That same page also contains new BIOS releases, with their release notes - have a look at them.