@phawkins633 lol. where did they claim1:1 ratio with 1900 is guaranteed? where did amd recommend 1:1 with 1900? unless you design chips, i say amd knows a bit more about what its potential is than you, nor do i remember them making claims with any hw specs (regarding IF) that we dont have. how many of your posts in this forum are about intels (multiple) issues on their cpus for the past 2-3y?? right

Part of what AMD stated for what future updates and newer AGESA code could contribute to but it's not a guarantee just a increase that it might work assuming you have the hardware that can take these settings without any stability issues. 🙂

"We are working on additional optimizations for 1900-2000MHz fabric clocks in our next AGESA release. AMD cannot guarantee any samples, including your own, will be able to hit these speeds. Although some current Ryzen 5000 samples are able to achieve a 1900+ fabric speed we feel confident even more users will be able to obtain these speeds with the forthcoming optimizations. If you recall on the 3000 series many, but not all, users were able to achieve a fabric speed of 1900. We believe this will be a similar situation with 5000 series processors and 2000MHz."

(This is taken from PC Gamer. https://www.pcgamer.com/amd-zen-3-infinity-fabric-lottery/ ) Other stuff includes things like under volting support returning and more.

What’s new in AGESA 1.1.0.0 for Ryzen 5000 Series: General performance improvements for many types of workloads Improved support for loading and applying overclocked memory profiles Improved BIOS overclocking robustness Improved USB hotplug detection Improved SATA device detection on select SATA ports Adds support for Eco Mode for automatic TDP reduction (AMD Ryzen Master) Overall, this AGESA is designed to bring the Ryzen 5000 Series to the full performance and experience intended by AMD. Performance optimization is really the hero of this release, so make sure you grab the update for your motherboard when you’re up and running on “Zen 3.” But that’s not all! We have an exciting roadmap beyond AGESA 1.1.0.0 and wanted to give you a small preview of what’s coming in future BIOS updates. Beyond AGESA 1.1.0.0 for Ryzen 5000 Series: Returning support for negative core voltage offsets (“undervolting”) with all-new AMD functionality for better frequency, voltage, and performance tweaking Additional AMD optimization for performance and stability at ~2000MHz fabric clock. While not all processors are innately capable of reaching this frequency, our tuning is intended to help stabilize the overclock on capable samples2 —good luck! Additional functionality tuning for benchmarking under extreme OC conditions (e.g. LN2)

(This is through Video Card Z from AMD's Robert Hallock.) Far as A, B and the latest C patches the only thing I have heard is improved memory compatibility and fixing potential instability and errors but I don't know what else these might have over the initial 1.1.0.0 data.