MSI PRO B850M-A WiFi PZ
Motherboards · MSI
Last checked
Latest Firmware
Version 7E78v1A33
Released
15.7 MB
Update track record
- releases tracked since 2025
- 9
- typical gap between releases
- ~2 months
- since the latest release
- 4 days
- security-related releases · latest 2026-09-07
- 1
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Firmware History
7E78v1A33
LatestSecurity- AGESA PI-1.3.0.1d updated. - uCode update for security issue mitigation.
Download from MSI (opens in new tab)7E78v1A32
- AGESA PI-1.3.0.1b Patch A updated. - TSME (Transparent Secure Memory Encryption) enabling with the Ryzen 9000 series CPU.
Download from MSI
Why Keep Your Firmware Updated
Motherboard BIOS/UEFI firmware is essential for hardware initialization and CPU compatibility. Updates often include microcode patches for security vulnerabilities, support for newer processors and memory, and stability improvements. Always use a UPS or ensure stable power during BIOS updates — an interrupted flash can render the board unbootable.