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Made by ASUS · firmware
The ASUS PRIME B850M-K 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: January 1, 2025
Version 1686, released July 2, 2026
Last checked for updates: Aug 2, 2026 17:16 UTC
Updated AGESA ComboAM5 PI 1.3.0.1b Patch A to support the GNR Transparent Secure Memory Encryption (TSME) feature. Before running the USB BIOS Flashback tool, please rename the BIOS file (A5687.CAP) using BIOSRenamer.
LatestUpdate has tracked 14 versions of ASUS PRIME B850M-K firmware, released between March 11, 2025 and July 2, 2026.
A firmware update is expected soon, between July 19, 2026 and August 18, 2026.
ASUS typically releases firmware updates for this product approximately every 25 days.
Official ASUS PRIME B850M-K product page
The ASUS PRIME B850M-K 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. It was originally released on January 1, 2025.
The latest firmware version of ASUS PRIME B850M-K is 1686. It was released on July 2, 2026.
ASUS PRIME B850M-K firmware version 1686 includes the following changes: Updated AGESA ComboAM5 PI 1.3.0.1b Patch A to support the GNR Transparent Secure Memory Encryption (TSME) feature. Before running the USB BIOS Flashback tool, please rename the BIOS file (A5687.CAP) using BIOSRenamer.
To update the ASUS PRIME B850M-K firmware, download the latest version (1686) from ASUS's website. Follow ASUS's installation instructions, which typically involve copying the firmware file to a memory card or connecting via USB. You can download the latest firmware from ASUS's support page.
Details and download instructions for the latest ASUS PRIME B850M-K firmware (version 1686) are on ASUS's official release page: https://www.asus.com/motherboards-components/motherboards/prime/prime-b850m-k/helpdesk_bios/
You can track ASUS PRIME B850M-K firmware updates automatically on LatestUpdate.io. We monitor ASUS's releases and notify you when new firmware versions are available, so you never miss an update.
We have tracked 14 firmware versions of ASUS PRIME B850M-K. Based on historical patterns, updates are released approximately every 25 days. ASUS releases updates to fix bugs, improve performance, and add new features. Track this product on LatestUpdate.io to be notified of future releases.
Based on this product's update history, a firmware update for ASUS PRIME B850M-K is expected soon, between July 19, 2026 and August 18, 2026. Track this product on LatestUpdate.io to be notified when it's released.
Yes, ASUS PRIME B850M-K received a firmware update within the last 3 months. The most recent version is 1686.
ASUS PRIME B850M-K is manufactured by ASUS. Visit the official product page for more information.