MSI PRO B850M-G
Specifications
- Manufacturer: MSI
- Chipset: B850
- Socket: AM5
- Form Factor: Micro ATX
- DIMM Slots: 2
- Color: Silver / Black
BIOS Update Status
- AGESA 1.2.0.3C
Improves high-density memory compatibility, allowing stable operation of 4x DIMM configurations and 256GB total capacity.
- AGESA 1.2.7.0
Major enablement patch for next-generation 2026 processors; updates the PSP firmware and improves USB compatibility.
- AGESA 1.3.0.0
Preliminary support for the next major AM5 architecture revision; includes significant security hardening and memory training overhauls.
Latest BIOS Version
- AGESA PI pre-1.3.0.0 updated. - Enable the "BIOS UEFI/CSM Mode" option.
BIOS Release Notes Analysis
System Stability & Architecture
The firmware lifecycle begins with the initial platform launch in version v1A10. Update v1A20 integrates AGESA 1.2.0.3e, which mitigates the TPM Out-of-Bounds Read vulnerability (CVE-2025-2884) and refines voltage safety limits for X3D processors. This version also expands memory support to include high-density 64GB DRAM modules for 128GB total capacity, optimizes 1DPC 1R configurations, and improves overclocking stability for Samsung 4Gx8 chips. Version v1A22 further refines memory compatibility and optimizes the Secure Erase mechanism for storage maintenance.
Performance Tuning & Latest Features
Subsequent updates focus on architectural refinements and security hardening. Version v1A21 updates the codebase to AGESA 1.2.0.3f to address unspecified security mitigations. Version v1A23 advances to AGESA 1.2.0.3g, specifically enhancing compatibility with Ryzen 8000 series processors. The latest update, v1A25, implements AGESA pre-1.3.0.0, establishing preliminary support for the next major AM5 architecture revision and including significant security hardening measures.
ℹ️AI-synthesized summary derived from official changelogs and verified microcode specifications. Always verify with the manufacturer.