AMD's Ryzen processor just received another big AGESA update, this release focuses on enhancing the stability of memory overclocks in excess of DDR4-2667. A ton of new memory overclocking features were added, you can check them out at the AMD Community blog.
AGESA 18.104.22.168 officially adds 26 new parameters that can improve the compatibility and reliability of DRAM, especially for memory that does not follow the industry-standard JEDEC specifications (e.g. faster than 2667, manual overclocking, or XMP2 profiles).
The following table spells out all the new parameters, and provides a few words on what they do. Keeping in mind that this is overclocking territory, manual or automated control of these parameters should nevertheless make it a little more straightforward to use DDR4-3200 modules—or faster if you have the talent!
The update got rolled out to motherboard makers, who will need a bit of time to roll out BIOS updates. AMD believes these BIOS updates will be available by mid to late June. Some motherboards like the Gigabyte GA-AX370-Gaming 5 and ASUS Crosshair VI already have public betas available.
AMD also kindly reminds users that memory overclocking voids the warranty of your Ryzen CPU.