MSI PRO-B660M-B-DDR4

Specifications

  • Manufacturer: MSI
  • Chipset: B660
  • Socket: LGA1700
  • Form Factor: Micro ATX
  • DIMM Slots: 2
  • Color: Black / Silver

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:7D45v1O
Release Date:2025-08-15

– Modify security setting. – Fix Fan setting will be changed after selecting exit without saving. – Update ME FW v16.1.38.2676 - ME Firmware ver: ME_16.1.38.2676 (download) - ME Firmware update SOP

BIOS Release Notes Analysis

Launch Stability & Compatibility

The initial firmware lifecycle establishes platform baselines and broadens hardware support. Following the v10 launch, versions v11 and v18 fine-tune memory training algorithms and improve compatibility with Asmedia SATA devices. Version v13 enables support for the Intel Core i9-12900KS, while v12 introduces the Post Screen Delay function and optimizes PCIe lane allocation. Storage and boot protocols are refined in v1B, which adds support for the exFAT file system, and v14, which adjusts default Secure Boot settings to enhance system security posture.

Feature Maturity & Hardware Support

Mid-cycle updates focus on next-generation processor integration and feature optimization. Version v1F enables support for 14th Gen processors and resolves "UNSUPPORTED PROCESSOR" BSODs. Version v1G optimizes the Intel Application Optimization (APO) function and updates Overclocking (OC) auto rules for better performance scaling. Usability enhancements include the integration of the MSI Driver Utility Installer in v1D, improved Microcode Selection features in v1C, and enhanced SATA device compatibility.

Critical Security & Power Management

Recent updates address high-priority stability issues and security vulnerabilities. Version v1I integrates Microcode 0x123 to optimize performance by disabling CEP on specific steppings, while v1J applies Microcode 0x125 to patch eTVB algorithm errors and resolves CVE-2024-36877. To mitigate physical degradation risks, v1K1[Beta] and v1K implement Microcode 0x129, enforcing a 1.55V voltage clamp. Version v1L addresses the root cause of Vmin Shift Instability via Microcode 0x12B. Continued maintenance in v1O1[Beta] updates to Microcode 0x12F for advanced voltage drift mitigation, while v1N and v1O resolve DMI UUID loss and fan setting persistence issues.

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