ASUS PRIME B450M-K II uses the AMD B450 chipset and covers a wide Ryzen range, from 1st Gen up to 5000 Series, 5000 G-Series and 4000 G-Series, plus Athlon with Radeon Vega Graphics. Windows 10 and Windows 7 64bit are the listed operating systems.
Product released: April 1, 2018
Latest firmware version
Version 4655, released August 27, 2026
Last checked for updates: Oct 31, 2026 06:26 UTC
What's new in version 4655
1. Update AGESA version to ComboV2 PI 1.2.0.12.
2. Mitigate fTPM vulnerabilities (CVE-2026-6726, CVE-2026-6727).
Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450MK2.CAP) using BIOSRenamer.
LatestUpdate has tracked 28 versions of ASUS PRIME B450M-K II firmware, released between September 11, 2020 and August 27, 2026.
Version 4655 - August 27, 2026: 1. Update AGESA version to ComboV2 PI 1.2.0.12. 2. Mitigate fTPM vulnerabilities (CVE-2026-6726, CVE-2026-6727). Before running the USB BIOS Flashback tool, pl…
Version 4651 - June 30, 2026: 1.Update AGESA version to ComboV2 PI 1.2.0.12. 2. Implemented security updates. Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450M…
Version 4645 - January 27, 2026: Improve system compatibility Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450MK2.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 - June 23, 2025: Improve system compatibility Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450MK2.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 4403 - 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 30, 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 4202 - July 11, 2023: 1. Improve system performance and compatibility. 2. Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450MK2.CAP) using BIOSRenamer.
Version 4004 - June 20, 2023: Improve system compatibility Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450MK2.CAP) using BIOSRenamer.
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 15, 2022: Improve system compatibility Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450MK2.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 (PB450MK2.C…
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 (PB450MK2…
Version 3202 - June 25, 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 (PB450MK2.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 (PB450MK2.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 0309 - September 11, 2020: PRIME B450M-K II R1.02 BIOS 0309 and LAN tool&AI1315 FW first release Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450MK2.CAP) us…
Update prediction
A firmware update is expected soon, between October 1, 2026 and December 20, 2026.
ASUS typically releases firmware updates for this product approximately every 93 days.
ASUS PRIME B450M-K II uses the AMD B450 chipset and covers a wide Ryzen range, from 1st Gen up to 5000 Series, 5000 G-Series and 4000 G-Series, plus Athlon with Radeon Vega Graphics. Windows 10 and Windows 7 64bit are the listed operating systems. It was originally released on April 1, 2018.
What is the latest firmware version of ASUS PRIME B450M-K II?
The latest firmware version of ASUS PRIME B450M-K II is 4655. It was released on August 27, 2026.
What changed in ASUS PRIME B450M-K II firmware version 4655?
ASUS PRIME B450M-K II firmware version 4655 includes the following changes: 1. Update AGESA version to ComboV2 PI 1.2.0.12.
2. Mitigate fTPM vulnerabilities (CVE-2026-6726, CVE-2026-6727).
Before running the USB BIOS Flashback tool, please rename the BIOS file (PB450MK2.CAP) using BIOSRenamer.
Where can I download the latest ASUS PRIME B450M-K II firmware?
Details and download instructions for the latest ASUS PRIME B450M-K II firmware (version 4655) are on ASUS's official release page: https://www.asus.com/motherboards-components/motherboards/prime/prime-b450m-k-ii/helpdesk_bios/
How often does ASUS release firmware updates for ASUS PRIME B450M-K II?
We have tracked 28 firmware versions of ASUS PRIME B450M-K II. Based on historical patterns, updates are released approximately every 93 days.
When is the next ASUS PRIME B450M-K II firmware update expected?
Based on this product's update history, a firmware update for ASUS PRIME B450M-K II is expected soon, between October 1, 2026 and December 20, 2026.
Is ASUS PRIME B450M-K II still receiving firmware updates?
Yes, ASUS PRIME B450M-K II received a firmware update within the last 3 months. The most recent version is 4655.