Made by ASUS
The ASUS PRIME B840M-A is an ASUS PRIME series mainstream motherboard supporting AMD Ryzen 7000+ processors (AMD 800-series chipset) on the AM5 socket with DDR5 memory. It targets home office users and mainstream builders and provides a comprehensive feature set for its platform tier. BIOS updates deliver stability improvements, security patches, new processor compatibility, and platform optimizations.
Product released: March 1, 2025
Version 1644, released March 27, 2026
1. AGESA updated to ComboAM5 PI_1.3.0.0a. 2. Provide additional stability margin during high-frequency DDR5 training. 3. Addresses potential boot failures and stability issues observed on certain Ryzen 9000 configurations. 4. Resolves an issue where systems might unexpectedly prompt for a BitLocker recovery key during startup. Before running the USB BIOS Flashback tool, please rename the BIOS file (A5622.CAP) using BIOSRenamer.
This product was recently updated. The next firmware update is expected between April 16, 2026 and May 22, 2026.
ASUS typically releases firmware updates for this product approximately every 35 days.