MSI is releasing a slew of new 400-series AMD motherboards to deliver on AMD’s promise of backwards compatibility for its new Ryzen 3000 CPUs and last-gen AM4 boards. It’s had to do this because a large percentage of its existing B450 and X470 motherboards are still using 16MB BIOS chips which are simply not big enough to cope with the latest microcode updates necessary to make the new 3rd Gen Ryzen processors function in the older motherboards.
Like the X570 motherboards which have accompanied the new AMD launch, these latest MSI MAX boards feature 32MB BIOS chips which are able to accommodate the beefy AGESA ComboAM4 18.104.22.168a microcode. The previous beta BIOS updates released for the existing MSI X470 and B450 motherboards needed to nix a bunch of features and product support to be able to offer any compatibility for the likes of the Ryzen 9 3900X or Ryzen 7 3700X.
All A-series and Athlons using the old Bristol Ridge design, the first chips to take advantage of the AM4 socket, have been cut from the beta 16MB BIOS updates, as has support for RAID arrays. MSI has also killed the shiny Click BIOS 5 software and replaced it with a very old-school black and white setup.