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Made by ASUS · firmware
ASUS PRIME B840M-K is a micro-ATX AM5 board on the AMD B840 chipset with two DDR5 slots, up to 128GB, for Ryzen 9000, 8000 and 7000 processors. Video is HDMI only, the rear panel offers four USB 5Gbps ports, and onboard are two M.2 slots, four SATA ports and Q-LED indicators for CPU, DRAM, VGA and boot device.
Product released: March 1, 2025
Version 1804, released September 21, 2026
Last checked for updates: Oct 31, 2026 06:01 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 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 product page
ASUS PRIME B840M-K is a micro-ATX AM5 board on the AMD B840 chipset with two DDR5 slots, up to 128GB, for Ryzen 9000, 8000 and 7000 processors. Video is HDMI only, the rear panel offers four USB 5Gbps ports, and onboard are two M.2 slots, four SATA ports and Q-LED indicators for CPU, DRAM, VGA and boot device. It was originally released on March 1, 2025.
The latest firmware version of ASUS PRIME B840M-K is 1804. It was released on September 21, 2026.
ASUS PRIME B840M-K 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 firmware (version 1804) are on ASUS's official release page: https://www.asus.com/motherboards-components/motherboards/prime/prime-b840m-k/helpdesk_bios/
We have tracked 9 firmware versions of ASUS PRIME B840M-K. Based on historical patterns, updates are released approximately every 47 days.
Based on ASUS PRIME B840M-K'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 received a firmware update within the last 3 months. The most recent version is 1804.