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Made by ASUS · firmware
ASUS PRIME B840M-K-CSM is the CSM (Corporate Stable Model) edition of the PRIME B840M-K, aimed at business deployments. The micro-ATX AM5 board uses the AMD B840 chipset and two DDR5 slots up to 128GB with ECC and non-ECC support, plus Realtek 2.5Gb Ethernet, HDMI output and two M.2 slots running PCIe 4.0.
Product released: March 1, 2025
Version 1804, released September 21, 2026
Last checked for updates: Oct 31, 2026 06:24 UTC
1. Update to AGESA ComboAM5 PI 1.3.0.1d. 2. Enhanced memory performance, system stability, and compatibility with CXMT memory chips for improved low-latency operation.
LatestUpdate has tracked 9 versions of ASUS PRIME B840M-K-CSM firmware, released between January 12, 2026 and September 21, 2026.
A firmware update was expected by November 6, 2026 but has not yet been released.
ASUS typically releases firmware updates for this product approximately every 47 days.
Official ASUS PRIME B840M-K-CSM product page
ASUS PRIME B840M-K-CSM is the CSM (Corporate Stable Model) edition of the PRIME B840M-K, aimed at business deployments. The micro-ATX AM5 board uses the AMD B840 chipset and two DDR5 slots up to 128GB with ECC and non-ECC support, plus Realtek 2.5Gb Ethernet, HDMI output and two M.2 slots running PCIe 4.0. It was originally released on March 1, 2025.
The latest firmware version of ASUS PRIME B840M-K-CSM is 1804. It was released on September 21, 2026.
ASUS PRIME B840M-K-CSM firmware version 1804 includes the following changes: 1. Update to AGESA ComboAM5 PI 1.3.0.1d. 2. Enhanced memory performance, system stability, and compatibility with CXMT memory chips for improved low-latency operation.
Details and download instructions for the latest ASUS PRIME B840M-K-CSM firmware (version 1804) are on ASUS's official release page: https://www.asus.com/motherboards-components/motherboards/prime/prime-b840m-k-csm/helpdesk_bios/
We have tracked 9 firmware versions of ASUS PRIME B840M-K-CSM. Based on historical patterns, updates are released approximately every 47 days.
Based on ASUS PRIME B840M-K-CSM's historical update patterns, a firmware update was expected by November 6, 2026 but has not yet been released. This may indicate an upcoming release or a change in the product's update schedule.
Yes, ASUS PRIME B840M-K-CSM received a firmware update within the last 3 months. The most recent version is 1804.