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Made by ASUS
The ASUS PRIME B450M-A II is an ASUS PRIME series mainstream motherboard supporting AMD Ryzen processors (AMD 400-series chipset) on the AM4 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: April 1, 2018
Version 4645, released January 27, 2026
Verified by LatestUpdate: June 14, 2026
Improve system compatibility Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450MA2.CAP) using BIOSRenamer.
This product has not received a firmware update in a long time and may be discontinued.
ASUS typically releases firmware updates for this product approximately every 90 days.
Official ASUS PRIME B450M-A II product page
The ASUS PRIME B450M-A II is an ASUS PRIME series mainstream motherboard supporting AMD Ryzen processors (AMD 400-series chipset) on the AM4 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. It was originally released on April 1, 2018.
The latest firmware version for the ASUS PRIME B450M-A II is 4645. It was released on January 27, 2026.
ASUS PRIME B450M-A II firmware version 4645 includes the following changes: Improve system compatibility Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450MA2.CAP) using BIOSRenamer.
To update the ASUS PRIME B450M-A II firmware, download the latest version (4645) from ASUS's website. Follow ASUS's installation instructions, which typically involve copying the firmware file to a memory card or connecting via USB. You can download the latest firmware from ASUS's support page.
Details and download instructions for the latest ASUS PRIME B450M-A II firmware (version 4645) are on ASUS's official release page: https://www.asus.com/motherboards-components/motherboards/prime/prime-b450m-a-ii/helpdesk_bios/
You can track ASUS PRIME B450M-A II firmware updates automatically on LatestUpdate.io. We monitor ASUS's releases and notify you when new firmware versions are available, so you never miss an update.
We have tracked 26 firmware versions for the ASUS PRIME B450M-A II. Based on historical patterns, updates are released approximately every 90 days. ASUS releases updates to fix bugs, improve performance, and add new features. Track this product on LatestUpdate.io to be notified of future releases.
The ASUS PRIME B450M-A II has not received a firmware update in a long time and may be discontinued. However, some products resume updates after extended periods. Track this product on LatestUpdate.io to be notified if a new update is released.
Yes, the ASUS PRIME B450M-A II received a firmware update within the last year. The most recent version is 4645.
The ASUS PRIME B450M-A II is manufactured by ASUS. Visit the official product page for more information.