
MSI has unveiled its latest BIOS update, AGESA 1.2.0.3e, designed specifically for AM5 800-series motherboards. This release enhances compatibility with new AMD Ryzen CPUs while providing improved memory support.
Enhancements in AGESA 1.2.0.3e BIOS: Expanded CPU Support and 256 GB DDR5 Memory Compatibility
The AGESA 1.2.0.3e BIOS marks a significant advancement after a period of dormancy in AGESA updates. Recently, several motherboard manufacturers issued firmware updates utilizing AGESA 1.2.0.3 Patch D. However, MSI has stepped forward with this newer update for its 800-series motherboards, particularly aimed at enriching the performance landscape for its users.
MSI is rolling out new AGESA 1.2.0.3e BIOS for X870/B850 mobos. New BIOS comes with optimization for Hynix/Micron/Samsung-chip 256GB (64GB x4) memory, and future CPU support. New AMD CPU coming soon? 🧐🧐🧐 pic.twitter.com/yipnTwhFpH
— chi11eddog (@g01d3nm4ng0) June 11, 2025
The AGESA 1.2.0.3e update introduces vital features that cater to both CPU and memory enhancement. Notably, MSI’s 800-series motherboards, encompassing both X870 and B850 models, can now accommodate up to 256 GB of memory in a 4×64 GB configuration from various DRAM manufacturers such as Hynix, Micron, and Samsung. This update also optimizes compatibility with 2DPC 1R setups and refines settings for overclocking Samsung’s 4Gx8 memory chips.
This improvement opens doors for overclockers and enthusiasts to experience superior memory compatibility and enhanced overclocking capabilities with the latest DDR5 DRAM modules from different suppliers. Such advancements position AM5’s DDR5 functionalities closer to Intel’s Core Ultra 2 platform, which currently benefits from CUDIMM support.

One of the most intriguing elements of this latest BIOS update is the confirmation from MSI regarding support for an upcoming AMD Ryzen CPU. While specific details regarding the CPU remain undisclosed, speculation suggests it could pertain to a Zen 5 variant, especially given recent clues hinting at potential new Ryzen releases. This could range from a standard Ryzen offering to an APU variant like the Ryzen 9000G “Strix Desktop, ”indicating that AMD has exciting developments in store for the desktop segment.
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