The new MSI BIOS is officially released for multiple 800-series chipset motherboards, which now offer improved compatibility with memory.
MSI’s New AGESA 1.2.0.3e BIOS Offers Support for up to 256 GB Memory Config at 6000 MT/s; Also Adds Support for a New AMD CPU
A few days ago, MSI silently rolled out a new BIOS update for some of its 800-series motherboards. The release notes revealed that the BIOS version will improve the compatibility of memory with MSI motherboards and will also support a “new” CPU. MSI has officially announced the new AGESA Combo PI-1.2.0.3e BIOS, which offers these optimizations once applied.
As per the press release, the AGESA Combo PI-1.2.0.3e BIOS will support all the AM5 motherboards, including the 800 and 600 series chipsets. This means users can download the new update even on entry-level chipsets like the A620. By releasing this new BIOS to its customers, MSI is claiming that now its motherboards offer improved DRAM support.
On some motherboards, you can now populate all 4x DIMM slots with 64 GB memory modules and run the systems with better stability than before. Even though some reports have already suggested that some models do run a 64GB x4 configuration, MSI claims that now the memory can be overclocked at 6000 MT/s or even at 6400 MT/s in some cases.
MSI motherboards have been optimized for overclocking large-capacity DRAM—compatible with DRAM chips from Micron, Hynix, and Samsung. Even with four 64GB DRAM fully installed, the system can still achieve a stable overclocking speed of 6000MT/s, and even up to 6400MT/s.
– MSI

The company shared screenshots of such configurations, where one can see some MSI motherboards running 256 GB of memory with no hassles. For instance, the system with Ryzen 7 9800X3D installed on a MAG B850M MORTAR Wi-Fi runs 256 GB of memory at 6400 MT/s speed with CL36-44-44-96. Hence, it’s safe to assume that the higher-end models will run such a configuration with even better stability.
Moreover, the new BIOS update also adds support for a new AMD CPU. While MSI hasn’t explicitly named it, it’s likely the AMD Ryzen 7 9700F, which we recently reported on. This is AMD’s first 9000F model with no integrated graphics, but apparently, the BIOS also lays the foundation for the upcoming Ryzen 9000G APUs as well.