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
Latest firmware version
Version 4645, released January 27, 2026
Last checked for updates: Aug 2, 2026 17:17 UTC
What's new in version 4645
Improve system compatibility
Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450MA2.CAP) using BIOSRenamer.
LatestUpdate has tracked 26 versions of ASUS PRIME B450M-A II firmware, released between September 3, 2020 and January 27, 2026.
Version 4645 - January 27, 2026: Improve system compatibility Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450MA2.CAP) using BIOSRenamer.
Version 4644 - September 22, 2025: This BIOS update for Ryzen™ 5000 G-Series /4000 G-Series /3000 G-Series /2000 G-Series systems includes a critical fTPM firmware upgrade, enhancing security an…
Version 4641 - August 14, 2025: 1. Updated AGESA version to ComboV2 PI 1.2.0.F. 2. Implemented security updates. Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450…
Version 4632 - July 9, 2025: Improve system compatibility Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450MA2.CAP) using BIOSRenamer.
Version 4631 - April 1, 2025: 1. Updated AGESA version to ComboV2 PI 1.2.0.E. 2. Implemented security updates. Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450…
Version 4622 - November 14, 2024: 1. Updated AGESA to version ComboV2PI 1.2.0.Cc. 2. Resolved CPU exception when adjusting items like ""When system is in sleep, hibernate, or soft off states""…
Version 4604 - April 8, 2024: Update AGESA version to ComboV2PI 1.2.0.Ca. Fix AMD processor vulnerabilities security. Before running the USB BIOS Flashback tool, please rename the BIOS file…
Version 4410 - February 27, 2024: Improve system compatibility. Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450MA2.CAP) using BIOSRenamer.
Version 4402 - January 8, 2024: 1.This update includes the patch for the LogoFAIL vulnerabilities 2.Support graphics card with M.2 storage Before running the USB BIOS Flashback tool, please r…
Version 4401 - October 25, 2023: 1. Update AGESA version to ComboV2PI 1.2.0.B 2. Update AMD 5000/3000 Series CPU fTPM version, please back up Bitlocker recovery key before updating this versio…
Version 4204 - September 4, 2023: Recommended for vital update to mitigate the potential security vulnerabilities Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450M…
Version 4202 - July 31, 2023: 1. Update AGESA version to ComboV2PI 1.2.0.A 2. Mitigate the AMD potential security vulnerabilities for AMD Athlon™ processors and Ryzen™ processors 3. Improve…
Version 4002 - March 21, 2023: 1. Update AGESA version to ComboV2PI 1208 2. Mitigate the AMD potential security vulnerabilities for AMD Athlon™ processors and Ryzen™ processors Before runnin…
Version 3810 - December 13, 2022: Improve system compatibility Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450MA2.CAP) using BIOSRenamer.
Version 3802 - May 12, 2022: 1. Update AMD AM4 AGESA V2 PI 1.2.0.7. 2. Fix AMD fTPM issue causes random stuttering. Before running the USB BIOS Flashback tool, please rename the BIOS file…
Version 3604 - March 15, 2022: 1. Update AMD AM4 AGESA V2 PI 1.2.0.6b 2. Improve system performance and stability 3. Improve system performance for AMD Ryzen 7 5800X3D Before running the USB…
Version 3211 - August 26, 2021: 1.Update AMD AM4 AGESA V2 PI 1.2.0.3 Patch C 2.Improve system performance Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450MA2.CAP…
Version 3205 - August 4, 2021: 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 (PB450MA2…
Version 3202 - June 24, 2021: 1. Update AMD AM4 AGESA V2 PI 1.2.0.3 Patch A 2. Improve system stability Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450MA2.CAP…
Version 3002 - March 19, 2021: - Update AMD AM4 AGESA V2 PI 1.2.0.1 - Support Smart Access Memory for Ryzen 3000 Series Processors - Fix the L3 cache performance in AIDA64 - Improved system…
Version 2807 - February 9, 2021: 1. Update AMD AM4 AGESA V2 PI 1.2.0.0 2. Update AMD RAID UEFI driver 3. Improve system stability Before running the USB BIOS Flashback tool, please rename the…
Version 2803 - January 18, 2021: 1． Improve system Performance and stability 2． Improve ReSizable BAR compatibility for NVIDIA RTX30 series graphics cards Before running the BIOS Flashback too…
Version 2602 - January 8, 2021: Update AMD AM4 AGESA V2 PI 1.1.9.0. Before running the BIOS Flashback tool, please rename the BIOS file (PB450MA2.CAP) using BIOSRenamer
Version 2409 - December 4, 2020: 1.New CPU support 2.Offer a Re-size BAR Support option to enhance GPU performance. Before running the USB BIOS Flashback tool, please rename the BIOS file (PB4…
Version 0401 - November 12, 2020: Improve system compatibility. Support ALC897 audio codec Before running the USB BIOS Flashback tool, please rename the BIOS file (.CAP) using BIOSRenamer.
Version 0310 - September 3, 2020: PRIME B450M-A II R1.00 and R1.01A BIOS 0310 and LAN tool&AI1315 FW first release. Before running the USB BIOS Flashback tool, please rename the BIOS file (PB45…
Update prediction
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.
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.
What is the latest firmware version of ASUS PRIME B450M-A II?
The latest firmware version of ASUS PRIME B450M-A II is 4645. It was released on January 27, 2026.
What changed in ASUS PRIME B450M-A II firmware version 4645?
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.
How do I update the ASUS PRIME B450M-A II firmware?
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.
Where can I download the latest ASUS PRIME B450M-A II firmware?
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/
How do I check for ASUS PRIME B450M-A II firmware updates?
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.
How often does ASUS release firmware updates for ASUS PRIME B450M-A II?
We have tracked 26 firmware versions of 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.
Has ASUS PRIME B450M-A II been discontinued?
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.
Is ASUS PRIME B450M-A II still receiving firmware updates?
Yes, ASUS PRIME B450M-A II received a firmware update within the last year. The most recent version is 4645.
Who makes ASUS PRIME B450M-A II?
ASUS PRIME B450M-A II is manufactured by ASUS. Visit the official product page for more information.