TechPowerUp posted a review on the AMD Announces AGESA Update 1.0.0.6 - Supports up to 4000 MHz Memory Clocks A quote from the article:

You've probably heard of AMD's AGESA updates by now - the firmware updates that are ironing out the remaining kinks in AMD's Ryzen platform, which really could have used a little more time in the oven before release. However, kinks have been disappearing, the platform has been maturing and evolving, and AMD has been working hard in improving the experience for consumers and enthusiasts alike. As a brief primer, AGESA is responsible for initializing AMD x86-64 processors during boot time, acting as something of a "nucleus" for the BIOS of your motherboard. Motherboard vendors take the core capabilities of AGESA updates and build on them with their own "secret sauce" to create the BIOS that ultimately populate your motherboard of choice. The process of cooking up BIOS updates built on the new AGESA will vary from manufacturer to manufacturer, but AMD's Robert Hallock says you should be seeing BIOSes based on this version halfway through the month of June - if your vendor isn't already providing a Beta version of some kind.

This new AGESA update code, version 1.0.0.6, should be just up the alley of enthusiasts, however, in that it adds a grand total of 26 new parameters for memory configuration, improving 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). Below you'll find the 26 parameters that were introduced.

 AMD Announces AGESA Update 1.0.0.6 - Supports up to 4000 MHz Memory Clocks @ techPowerUp