ASUS Prime X299-A II is an ATX board for the Intel Core X-series 10000 family on LGA 2066 with the X299 chipset. Eight DDR4 slots in quad channel reach 256GB, storage is two M.2 slots and eight SATA ports, and three PCIe 3.0 x16 slots sit alongside 9 rear and 10 front USB ports.
Product released: June 1, 2017
Latest firmware version
Version 2201, released August 28, 2026
Last checked for updates: Oct 31, 2026 06:25 UTC
What's new in version 2201
1. Update ASUS DB and DBX for security improvement
Before running the USB BIOS Flashback tool, please rename the BIOS file (X299A2.CAP) using BIOSRenamer.
LatestUpdate has tracked 16 versions of ASUS Prime X299-A II firmware, released between October 31, 2019 and August 28, 2026.
Version 2201 - August 28, 2026: 1. Update ASUS DB and DBX for security improvement Before running the USB BIOS Flashback tool, please rename the BIOS file (X299A2.CAP) using BIOSRenamer.
Version 2104 - May 4, 2026: 1.Improve system stability and performance 2.Update Intel microcode 3.Intel ME FW updated to 11.12.98.2655. 4.Enhance overall system security. “Before BIOS upd…
Version 2001 - January 14, 2025: 1.Intel ME FW updated to 11.12.97.2614. 2.Enhance system stability and compatibility. “Before BIOS update, please download Intel ME update tool from ASUS suppo…
Version 1801 - July 3, 2024: 1. This update includes the patch for the LogoFAIL vulnerabilities. 2. Improve system stability. “Before BIOS update, please download Intel ME update tool from…
Version 1601 - September 14, 2023: 1. Recommended for vital update to mitigate the potential security vulnerabilities 2. Improve system stability “Before BIOS update, please download Intel ME up…
Version 1403 - July 12, 2022: 01. Improved system stability 02. Strengthened system security and robustness 03. Improved memory compatibility Before running the USB BIOS Flashback tool, ple…
Version 1301 - December 1, 2021: Update ME firmware to 11.12.86.1877 version Improve system stability. Before running the USB BIOS Flashback tool, please rename the BIOS file (X299A2.CAP) usin…
Version 1201 - September 23, 2021: 01. Add new EC Id (XMC25QH20B) 02. Fix M.2 test card cannot be detected when device on PCIEX1 slot.
Version 1101 - July 24, 2021: 1. Support Windows 11 by default, no settings changes required in the UEFI BIOS. Before running the USB BIOS Flashback tool, please rename the BIOS file (X299A…
Version 1004 - April 19, 2021: - Support Resize Bar function. - Update AURA FW - Update CPU microcode for Intel security issue Before running the USB BIOS Flashback tool, please rename the B…
Version 0901 - January 19, 2021: -Improved system performance -Improved system stability Before running the USB BIOS Flashback tool, please rename the BIOS file (X299A2.CAP) using BIOSRenamer.
Version 0702 - July 23, 2020: 1. Update ME FW version. 2. Improved system stability 3. Update Microcode for IPU 2020.1 Before running the USB BIOS Flashback tool, please rename the BIOS fil…
Version 0603 - April 13, 2020: update Microcode for Intel security. Before running the USB BIOS Flashback tool, please rename the BIOS file (X299A2.CAP) using BIOSRenamer.
Version 0505 - January 22, 2020: 01. [E] Improve system performance and stability Before running the USB BIOS Flashback tool, please rename the BIOS file (X299A2.CAP) using BIOSRenamer.
Version 0504 - December 13, 2019: 1. Improve system performance. 2. Update to Intel’s latest microcode. Before running the USB BIOS Flashback tool, please rename the BIOS file (X299A2.CAP) usin…
Version 0401 - October 31, 2019: - Improve system performance and stability. - Improve DRAM stability - Show ACHI warning message in F1 POST message - Shorten system boot time. - Change the de…
Update prediction
This product was recently updated. The next firmware update is expected between November 10, 2026 and April 19, 2027.
ASUS typically releases firmware updates for this product approximately every 247 days.
ASUS Prime X299-A II is an ATX board for the Intel Core X-series 10000 family on LGA 2066 with the X299 chipset. Eight DDR4 slots in quad channel reach 256GB, storage is two M.2 slots and eight SATA ports, and three PCIe 3.0 x16 slots sit alongside 9 rear and 10 front USB ports. It was originally released on June 1, 2017.
What is the latest firmware version of ASUS Prime X299-A II?
The latest firmware version of ASUS Prime X299-A II is 2201. It was released on August 28, 2026.
What changed in ASUS Prime X299-A II firmware version 2201?
ASUS Prime X299-A II firmware version 2201 includes the following changes: 1. Update ASUS DB and DBX for security improvement
Before running the USB BIOS Flashback tool, please rename the BIOS file (X299A2.CAP) using BIOSRenamer.
Where can I download the latest ASUS Prime X299-A II firmware?
Details and download instructions for the latest ASUS Prime X299-A II firmware (version 2201) are on ASUS's official release page: https://www.asus.com/motherboards-components/motherboards/prime/prime-x299-a-ii/helpdesk_bios/
How often does ASUS release firmware updates for ASUS Prime X299-A II?
We have tracked 16 firmware versions of ASUS Prime X299-A II. Based on historical patterns, updates are released approximately every 247 days.
When is the next ASUS Prime X299-A II firmware update expected?
ASUS Prime X299-A II was recently updated. Based on this product's update history, the next firmware update is expected between November 10, 2026 and April 19, 2027.
Is ASUS Prime X299-A II still receiving firmware updates?
Yes, ASUS Prime X299-A II received a firmware update within the last 3 months. The most recent version is 2201.