ASRock B550M Phantom Gaming 4

Specifications

  • Manufacturer: ASRock
  • Chipset: B550
  • Socket: AM4
  • Form Factor: Micro ATX
  • DIMM Slots: 4
  • Color: Black

Resources

BIOS Update Notifications

Latest BIOS Version

Version:3.90
Release Date:2025-10-09

Update Secure Boot Key (2023 KEK/DB/PK).*To support Ryzen 5000 G-Series processors, it requires to update the BIOS with Matisse, Renoir or Vermeer CPU.

BIOS Release Notes Analysis

Launch Stability & Compatibility

The platform launched with v1.00, establishing initial support for AMD Ryzen 5000 series processors. Early firmware maturity was achieved in v1.50, which integrated AGESA 1.2.0.0 to enable Resizable BAR support for Ryzen 3000 CPUs and introduced compatibility for Ryzen 5000 G-Series APUs. A significant portion of the lifecycle focused on resolving USB connectivity issues common to the chipset; v1.60 initiated mitigations via AGESA 1.2.0.2, while v1.80 delivered the critical fix for USB dropouts and PCIe Gen 4 instability by implementing AGESA 1.2.0.3 Patch C. Version v1.80 also prepared the system for Windows 11 by enabling the fTPM by default.

Feature Maturity & Hardware Support

Hardware capabilities were significantly expanded in v1.90 with the update to AGESA 1.2.0.6b, which optimized L3 V-Cache performance for the Ryzen 7 5800X3D. System responsiveness was addressed in v2.00 (AGESA 1.2.0.7), which resolves the fTPM Stuttering issue caused by key validation latency in Windows. Version v2.10 introduced specific compatibility improvements for NVIDIA GeForce RTX 40 series GPUs. Furthermore, v2.62 (AGESA 1.2.0.8) unlocked native Curve Optimizer support for the Ryzen 7 5800X3D, allowing for granular voltage tuning that was previously locked on this processor.

Critical Security & Power Management

Recent updates focus on hardening the firmware against high-severity vulnerabilities. Version v3.20 integrates AGESA 1.2.0.B to mitigate the Inception speculative side-channel exploit, followed by v3.40 which patches the LogoFAIL image parsing vulnerability. Security was further tightened in v3.46[Beta] (AGESA 1.2.0.Cc), which resolves the Sinkclose SMM Lock Bypass. Forward-looking maintenance includes v3.61[Beta] (AGESA 1.2.0.E) to address SMM vulnerabilities (AMD-SB-7027) and v3.62[Beta] (AGESA 1.2.0.F), which updates fTPM firmware for improved Anti-Cheat compatibility. The security lifecycle continues with v3.90, which updates the Secure Boot Key database (KEK/DB/PK).

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