Among MSI's 300-series chipset socket AM4 motherboards to receive "Raven Ridge" support, are the X370 XPower Gaming Titanium, the X370 Gaming M7 ACK, the X370 Gaming Pro Carbon, the X370 Gaming Pro, X370 Gaming Plus, X370 SLI Plus, X370 Krait Gaming; the B350 Tomahawk Plus, the B350 Tomahawk, the B350 Tomahawk Arctic, B350 PC Mate, B350M Gaming Pro, B350M Mortar, B350M Bazooka, B350M Pro-VDH, and A320M Gaming Pro.You can find the updates via MSI's support pages. AMD promises AM4 backwards compatibility until 2020, but motherboard makers still have to provide the necessary updates to ensure smooth operation.
Via: TPU