MSI has not updated their website yet with the additional CPU options. RAM has been more of an issue for AMD users which has motivated more study into timing in the hope that a solution can be found.
Generally G.Skill has not been problematic but the old memory is not the fastest available. Both sets are from the NT series and there are 2x 4GB and 2x 8GB which affords 24GB total.
AMD Ryzen 3000 processors offer much more L3 cache but there are problems with the logic that hurt security research. BIOS updates are only a bandage. AMD is likely to have a new CPU available for socket AM4 before long. A refined 7nm processor would be helpful should the corrections be made and the design is secure.