Gigabyte B660M GAMING X AX (rev. 1.0)

Specifications

  • Manufacturer: Gigabyte
  • Chipset: B660
  • Socket: LGA1700
  • Form Factor: Micro ATX
  • DIMM Slots: 4
  • Color: Black

BIOS Update Status

  • Microcode 0x129

    Microcode update 0x129 addresses an issue where the processor may request high voltages, potentially leading to accelerated degradation.

  • Microcode 0x12B

    Microcode update 0x12B addresses elevated voltage requests by the processor during idle and/or light activity periods (includes 0x129).

  • Microcode 0x12F

    Microcode update 0x12F to further address processor degradation on systems with light activity.

Resources

BIOS Update Notifications

Latest BIOS Version

Version:F35a
Release Date:2026-04-28

Checksum: D31B Support HUDIMM (One Sub-channel DDR5) Improve memory compatibility

BIOS Release Notes Analysis

Launch Stability & Compatibility

Initial firmware revisions stabilize power delivery, with vF3 calibrating VRM parameters for improved performance. Version F4 enables support for the Intel Core i9-12900KS, while vF20 integrates 13th Gen Intel Core processors; note that vF20 requires Intel VMD driver v19.5 or newer to avoid OS crashes on legacy RAID configurations. Display interoperability is corrected in vF22, which resolves blank screens during POST on NVIDIA RTX 3060 GPUs and enables support for high-density 24GB and 48GB non-binary DDR5 modules.

Feature Maturity & Hardware Support

Security hardening begins in vF23, which patches vulnerabilities in the Download Assistant reported by Eclypsium Research. Version F26 updates the processor to Microcode 0x11D, while vF28 mitigates the critical LogoFAIL UEFI exploit and adds an "SPD Write Disable" option to protect memory configuration data. Feature expansion includes HWiNFO64 integration in vF24 for real-time BIOS monitoring and improved SPD write protection for JEDEC compliance in vF25.

Critical Security & Power Management

To address CPU degradation risks, vF30 implements Intel Default Settings and Microcode 0x12B, the root-cause fix for Vmin Shift Instability. This mitigation is refined in vF32c[Beta] and vF32 via Microcode 0x12F, which addresses edge-case voltage drifts and patches security vulnerabilities INTEL-SA-01153 and INTEL-SA-01247. Final updates vF33 and vF34 enforce a "Secure by Default" posture, enabling Pre-boot DMA Protection, VT-d, IOMMU, and Secure Boot out-of-the-box, alongside CSME v16.1.38.2676 updates.

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