ASUS PRIME X299-DELUXE II firmware

Made by ASUS

The ASUS PRIME X299-DELUXE II is an ASUS PRIME series mainstream motherboard supporting Intel Core X-series HEDT processors on the LGA2066 socket with DDR4 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: June 1, 2017

Latest firmware version

Version 4301, released March 30, 2026

What's new in version 4301

1.Improve system stability and performance 2.Update Intel microcode 3.Enhance overall system security. “Before BIOS update, please download Intel ME update tool from ASUS support site, and update ME firmware to Version 11.12.98.2655 to ensure optimized system settings.” Before running the USB BIOS Flashback tool, please rename the BIOS file (X299D2.CAP) using BIOSRenamer.

Download firmware 4301

firmware version history

• Version 4301 — March 30, 2026
• Version 4201 — January 17, 2025
• Version 4001 — June 7, 2024
• Version 3801 — September 7, 2023
• Version 3701 — June 28, 2022
• Version 3601 — November 10, 2021
• Version 3501 — August 3, 2021
• Version 3403 — March 25, 2021
• Version 3301 — January 5, 2021
• Version 3201 — November 9, 2020
• Version 3105 — August 17, 2020
• Version 3006 — February 14, 2020
• Version 0802 — October 4, 2019
• Version 0703 — July 22, 2019
• Version 0603 — June 14, 2019
• Version 0602 — April 11, 2019
• Version 0504 — February 21, 2019
• Version 0210 — October 12, 2018

Update prediction

This product was recently updated. The next firmware update is expected between June 29, 2026 and December 1, 2026.

ASUS typically releases firmware updates for this product approximately every 326 days.

Official ASUS PRIME X299-DELUXE II product page