Asus PRIME B650M-A II-CSM
Specifications
- Manufacturer: Asus
- Chipset: B650
- Socket: AM5
- Form Factor: Micro ATX
- DIMM Slots: 4
- Color: Silver / 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.
Latest BIOS Version
"1. AGESA updated to ComboAM5 PI_Pre1.3.0.0 for better security.2. Enhanced system performance and stability.3. Improved memory compatibility for JEDEC-compliant modules.Before running the USB BIOS Flashback tool, please rename the BIOS file (PB650MA2.CAP) using BIOSRenamer"
BIOS Release Notes Analysis
Launch Stability & Compatibility
Initial firmware revisions prioritize electrical safety and high-density memory validation for the AM5 platform. Updates v1414 and v1601 enforce a critical 1.30V limit on the SoC voltage rail to prevent thermal damage to Ryzen 7000X3D processors, aligning with AGESA 1.0.0.7a safety standards. Memory compatibility is significantly expanded in v1616, which enables support for non-binary 24GB and 48GB DDR5 modules, while v1654 integrates AGESA 1.0.0.7c to resolve boot failures with Samsung-based kits and improve high-speed signal integrity. Early platform maturity is established in v1807 via AGESA 1.0.8.0, which mitigates the Inception vulnerability and prepares the DXE phase for Ryzen 8000G APUs.
Feature Maturity & Hardware Support
Mid-cycle updates focus on next-generation processor enablement and performance-specific logic. Version 2613 introduces AGESA 1.1.7.0 to support Ryzen 9000 Granite Ridge processors, followed by v3014 (AGESA 1.2.0.0a) which implements Curve Shaper for granular voltage/frequency control. Gaming optimizations are delivered in v3056 (AGESA 1.2.0.2a) via Turbo Game Mode, which optimizes CCD parking to reduce inter-core latency. Support for Ryzen 9000X3D series (9950X3D/9900X3D) is added in v3222, alongside AI Cache Boost logic. Memory training algorithms are refined in v3208 to support 6600MT/s speeds via AEMP, and v3257 (AGESA 1.2.0.3d) specifically targets stability for fully populated 4-DIMM configurations.
Critical Security & Power Management
Firmware security is hardened through multiple CVE mitigations and architectural updates. Version 2214 (AGESA 1.1.0.1) patches the LogoFAIL vulnerability to prevent image-parsing exploits during boot. The high-severity Sinkclose (SMM Lock Bypass) vulnerability is resolved in v3035 (AGESA 1.2.0.1a), which also relocates the cTDP 105W control for improved accessibility. Further hardening occurs in v3201 (AGESA 1.2.0.3), addressing PeCoffLoader memory overflows and Microcode Signature Verification flaws. Finally, v3263 (AGESA 1.2.0.3e) and v3602 (AGESA 1.2.7.0) implement irreversible security updates to the PSP firmware and block rollback to vulnerable versions.
ℹ️AI-synthesized summary derived from official changelogs and verified microcode specifications. Always verify with the manufacturer.