Asus PRIME B650M-A AX II

Specifications

  • Manufacturer: Asus
  • Chipset: B650
  • 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.

Resources

BIOS Update Notifications

Latest BIOS Version

Version:3841
Release Date:2026-02-26

"1. AGESA updated to ComboAM5 PI_1.3.0.0a.2. Provide additional stability margin during high-frequency DDR5 training.3. Addresses potential boot failures and stability issues observed on certain Ryzen 9000 configurations.4. Resolves an issue where systems might unexpectedly prompt for a BitLocker recovery key during startup.Before running the USB BIOS Flashback tool, please rename the BIOS file (P650MAX2.CAP) using BIOSRenamer"

BIOS Release Notes Analysis

Launch Stability & Compatibility

Early firmware revisions focus on critical electrical safety and memory training baselines for the AM5 platform. Updates v1414 through v1616 enforce a hard 1.30V limit on the VDDCR_SOC rail to prevent thermal damage and physical burnout on Ryzen 7000X3D processors, aligning with AGESA 1.0.0.7a safety standards. Version v1601 expands memory controller logic to support non-binary 24GB and 48GB DDR5 modules, while v1654 integrates AGESA 1.0.0.7c to resolve boot failures with Samsung-based kits and stabilize high-speed memory training. Additionally, v1409 implements dedicated thermal monitoring mechanisms to replace manual Vcore control, ensuring operation within safe silicon limits.

Feature Maturity & Hardware Support

Support for Ryzen 9000 Granite Ridge processors is established in v2613 via AGESA 1.1.7.0. Performance tuning for this architecture matures in v3056, which integrates AGESA 1.2.0.2a to introduce Turbo Game Mode, optimizing thread scheduling and CCD latency. Specific support for Ryzen 9000X3D variants (9950X3D/9900X3D) is enabled in v3222, which also introduces AI Cache Boost for compute workloads. For Ryzen 8000 APUs, v2413 disables STAPM throttling to sustain peak clocks, while v3035 exposes the cTDP 105W configuration option. High-density memory compatibility is further refined in v3257 (AGESA 1.2.0.3d), stabilizing configurations utilizing all four DIMM slots.

Critical Security & Power Management

Version v2214 patches the LogoFAIL vulnerability (AGESA 1.1.0.1), preventing malicious payload execution during the DXE boot phase. The high-severity SMM Lock Bypass vulnerability, identified as Sinkclose, is mitigated in v3035 via AGESA 1.2.0.1a, preventing ring -2 privilege escalation. Further hardening occurs in v3201 (AGESA 1.2.0.3), which resolves PeCoffLoader memory overflows and AMD Microcode Signature Verification flaws. The update trajectory concludes with v3602, implementing AGESA 1.2.7.0 to update PSP firmware for next-generation architecture readiness, following the irreversible security blocks and rollback restrictions introduced in v3263.

ℹ️AI-synthesized summary derived from official changelogs and verified microcode specifications. Always verify with the manufacturer.