AMD planned they would only offer ZEN3 support for Series 500 motherboard chipsets, the reversed that decision and stated 32MB BIOS ready motherboards can support ZEN3. Now MSI mentions Zen 3 support on its AMD 400-series Chipset Motherboards with 16MB ROMs.
Yeah, not confusing at all eh? But it's sufficient to say there will be wide support from motherboard manufacturers on the Series 400 chipset platform for ZEN3. Eric van Beurden over at MSI in a presentation confirmed that with the non-MAX motherboards (16MB BIOS) will get Zen 3 support as well as MAX (32MB BIOS) versions with a 'selective BIOS' option.
MSI adds ZEN3 support to Series 400 Chipsets, even with 16 MB BIOS
