Gigabyte B840M Ds3H (rev. 1.1)

Specifications

  • Manufacturer: Gigabyte
  • Chipset: B840
  • Socket: AM5
  • Form Factor: Micro ATX
  • DIMM Slots: 4
  • Color: Gray / 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.

Resources

BIOS Update Notifications

Latest BIOS Version

Version:F10b
Release Date:2026-04-19

Checksum: 8FF3 Update AMD AGESA 1.3.0.1 Supports AMD’s next-generation memory specifications

BIOS Release Notes Analysis

Launch Stability & Compatibility

The initial release vF1 establishes the platform baseline with AGESA 1.2.0.2a, optimizing thread scheduling for Ryzen 9000 X3D processors and introducing X3D Turbo Mode to reduce latency in gaming workloads. Update vF2 integrates AGESA 1.2.0.2b to patch critical SMM vulnerabilities and improve system stability during sleep state transitions. Subsequent updates, including vF4 and vF7, focus on broadening memory compatibility and resolving general system stability issues.

Feature Maturity & Hardware Support

Firmware vF3 updates to AGESA 1.2.0.3a PatchA, enabling support for Ryzen 9 9000X3D series processors and optimizing 2CCD performance for Ryzen 7000 and 9000 CPUs when paired with updated chipset drivers. Update vF6 introduces support for the AI TOP Utility and enforces Secure Boot as the system default to harden platform integrity. The roadmap extends to vF8, which integrates AGESA 1.2.8.0 to enable next-generation Ryzen processors.

Critical Security & Power Management

Security hardening is a primary focus, with vF3 and vF5 addressing the microcode signature verification vulnerability (CVE-2024-36347) across Ryzen 7000, 8000, and 9000 series CPUs. Version vF5 also implements AGESA 1.2.0.3e to mitigate the TPM Out-of-Bounds Read vulnerability (CVE-2025-2884) and refine voltage safety limits. Finally, vF8 resolves the critical Hynix Rowhammer issue (CVE-2025-6202) affecting specific DDR5 modules.

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