Intel Motherboards - Z390 Ultimate BIOS Downgrade

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Z390 Ultimate BIOS Downgrade

Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=11544
Printed Date: 06 Feb 2025 at 4:38am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: Z390 Ultimate BIOS Downgrade

Posted By: ADVenturePO
Subject: Z390 Ultimate BIOS Downgrade
Date Posted: 26 May 2019 at 6:55am

Hello,

I'm a workstation builder.
I make most of my WS on ASROCK.
But now OC on 4.1 and 4.0 BIOS is much more unstable.
I'd like to force downgrade of BIOS to 1.9 which I find best. How can I do it?
Also even id
Cheers.

Peter.

Replies:

Posted By: ASRock_TSD
Date Posted: 28 May 2019 at 10:26am

Dear Peter,

Thank you for choosing ASRock.

It will not able to flash to previous BIOS once upgrading to BIOS P4.00.
Please clear CMOS to load BIOS default and reinstall a clean OS to try.
Note: We don't recommend users to update the BIOS if their system is already running normally.
https://www.asrock.com/MB/Intel/Z390%20Taichi%20Ultimate/index.asp#BIOS

Thank you!
Yours truly,
ASRock TSD

Posted By: ADVenturePO
Date Posted: 28 May 2019 at 2:46pm

Dear ASRock,

The board came with 4.0 BIOS.
I already managed to update BIOS 4.1 due to instabilities.
No, the system Was brand new and it didn't let me update BIOS.
From Windows and from UEFI it says "Invalid file"

Thank you for your answer.

Have a nice day.
Peter