Asus PRIME B850M-A
Specifications
- Manufacturer: Asus
- Chipset: B850
- Socket: AM5
- Form Factor: Micro ATX
- DIMM Slots: 4
- Color: Black / Silver
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
"1. AGESA updated to ComboAM5 PI_1.3.0.0a.Before running the USB BIOS Flashback tool, please rename the BIOS file (A5678.CAP) using BIOSRenamer"
BIOS Release Notes Analysis
System Stability & Architecture
The firmware lifecycle begins with the initial release v0216, establishing baseline platform functionality. Version v1028 expands memory support, specifically optimizing compatibility for high-capacity modules to ensure stability in dense configurations. A critical architectural update arrives with v1065, which integrates AGESA 1.2.0.3e. This version mitigates the TPM Out-of-Bounds Read vulnerability (CVE-2025-2884) and refines voltage safety limits for Ryzen 9000X3D series processors. Due to these security changes, v1065 enforces a rollback block, preventing reversion to older, less secure firmware.
Performance Tuning & Latest Features
Mid-cycle updates focus on iterative AGESA refinements, with v1078 (AGESA 1.2.0.3f) and v1087 (AGESA 1.2.0.3g) enhancing device compatibility and overclocking stability. Version v1081 provides general system stability improvements between these AGESA shifts. The latest firmware, v1402, transitions the platform to AGESA 1.2.7.0. This major update upgrades the PSP firmware to enable preliminary support for next-generation 2026 processors and resolves USB compatibility issues, while maintaining the security rollback restrictions established in earlier versions.
ℹ️AI-synthesized summary derived from official changelogs and verified microcode specifications. Always verify with the manufacturer.