ASUS PRIME B860M-A is a 9.6 inch by 9.6 inch board for LGA1851 Intel Core Ultra (Series 2) processors on the B860 chipset, with four DDR5 slots up to 256GB. Two DisplayPort outputs, HDMI and a USB 20Gbps Type-C port cover video, and two M.2 slots (one PCIe 5.0 x4) handle storage.
Product released: January 1, 2025
Latest firmware version
Version 3401, released September 23, 2026
Last checked for updates: Oct 31, 2026 17:45 UTC
What's new in version 3401
Enhanced memory performance, system stability, and compatibility with CXMT memory chips for improved low-latency operation.
Updating this BIOS will simultaneously update the corresponding Intel ME to version 19.0.11.2289. The ME version will remain updated even if you roll back to an older BIOS later. We recommend using EZ Flash to update the BIOS, as it supports ZIP format and auto-updates the ME.
LatestUpdate has tracked 15 versions of ASUS PRIME B860M-A firmware, released between October 30, 2024 and September 23, 2026.
Version 3401 - September 23, 2026: Enhanced memory performance, system stability, and compatibility with CXMT memory chips for improved low-latency operation. Updating this BIOS will simultaneou…
Version 3212 - August 14, 2026: 1. Updated ME to version 19.0.11.2289v0.4 and GOP to 1069 2. Introduced the new AEMP Mix Tuning feature to enhance memory compatibility. 3. Optimized overall s…
Version 3020 - April 30, 2026: Improves system performance, stability, and adds support for HUDIMM. Updating this BIOS will simultaneously update the corresponding Intel ME to version 19.0.5…
Version 3011 - April 21, 2026: 1. Improved system performance 2. Silicon Initialization Code updated to 0D.00.0A.30 3. Updated Management Engine (ME) to version 19.0.5.2175v0.3 Updating this…
Version 3002 - January 30, 2026: 1.Support for future Intel® Core™ Ultra series processors. 2.Update AMI BIOS Codebase to version 5.32_9AACA_RC0D.00.05.10(6011.00)_213. 3.Update Intel® ME firm…
Version 1802 - September 30, 2025: 1. Update the Intel microcode to version 0x11a. 2. Enhanced system performance and device compatibility. Updating this BIOS will simultaneously update the corr…
Version 1606 - July 29, 2025: 1. Improved system performance, stability, and device compatibility. 2. Updated Management Engine (ME) to version 19.0.5.1992. Updating this BIOS will simultan…
Version 1405 - May 14, 2025: Update Management Engine (ME) to version 19.0.5.1984. Updating this BIOS will simultaneously update the corresponding Intel ME to version 19.0.5.1984. The ME v…
Version 1402 - April 25, 2025: 1. Included DIMM Fit Pro 2. Improved system compatibility and performance Updating this BIOS will simultaneously update the corresponding Intel ME to version 1…
Version 1204 - March 31, 2025: 1.Microcode updated to 0x117. 2.Intel® CSME updated to 19.0.5.1948. 3.Silicon Initialization Code updated to 0D.00.D8.30 (M.R.C: 2.10.0.0). 4.Included DLRM Set…
Version 1001 - February 11, 2025: This BIOS enhances system performance and improves high-capacity memory compatibility. This includes support for 2*DIMM memory configurations, achieving speeds…
Version 0805 - January 13, 2025: Support up to 5600MT/s when running the maximum memory capacity of 256GB. The exclusive ""AEMP III"" option will appear when four Kingston RAM DDR5 6400MT/s 64…
Version 0802 - January 6, 2025: 1. Silicon Initialization Code updated to v0D.00.CC.50 (M.R.C:1.4.6.81). 2. Add SA - PCI Express / L1 Substates item to support CPU PCI Express Link Power Mana…
Version 0606 - December 27, 2024: 1. Intel microcode updated to 0x114. 2. M.R.C updated to v1.4.6.64. 3. ME FW updated to v19.0.0.1827. 4. GOP updated to v1057. 5. RST VMD updated to v20.1.0.58…
ASUS PRIME B860M-A is a 9.6 inch by 9.6 inch board for LGA1851 Intel Core Ultra (Series 2) processors on the B860 chipset, with four DDR5 slots up to 256GB. Two DisplayPort outputs, HDMI and a USB 20Gbps Type-C port cover video, and two M.2 slots (one PCIe 5.0 x4) handle storage. It was originally released on January 1, 2025.
What is the latest firmware version of ASUS PRIME B860M-A?
The latest firmware version of ASUS PRIME B860M-A is 3401. It was released on September 23, 2026.
What changed in ASUS PRIME B860M-A firmware version 3401?
ASUS PRIME B860M-A firmware version 3401 includes the following changes: Enhanced memory performance, system stability, and compatibility with CXMT memory chips for improved low-latency operation.
Updating this BIOS will simultaneously update the corresponding Intel ME to version 19.0.11.2289. The ME version will remain updated even if you roll back to an older BIOS later. We recommend using EZ Flash to update the BIOS, as it supports ZIP format and auto-updates the ME.
Where can I download the latest ASUS PRIME B860M-A firmware?
Details and download instructions for the latest ASUS PRIME B860M-A firmware (version 3401) are on ASUS's official release page: https://www.asus.com/motherboards-components/motherboards/prime/prime-b860m-a/helpdesk_bios/
How often does ASUS release firmware updates for ASUS PRIME B860M-A?
We have tracked 15 firmware versions of ASUS PRIME B860M-A. Based on historical patterns, updates are released approximately every 60 days.
When is the next ASUS PRIME B860M-A firmware update expected?
Based on this product's update history, a firmware update for ASUS PRIME B860M-A is expected soon, between October 16, 2026 and December 5, 2026.
Is ASUS PRIME B860M-A still receiving firmware updates?
Yes, ASUS PRIME B860M-A received a firmware update within the last 3 months. The most recent version is 3401.