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Z390 Ultimate BIOS Downgrade |
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ADVenturePO 
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Joined: 26 May 2019 Status: Offline Points: 4 |
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 Topic: Z390 Ultimate BIOS DowngradePosted: 26 May 2019 at 6:55am |
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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. |
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ASRock_TSD
ASRock_Official 
Joined: 20 Mar 2015 Status: Offline Points: 8802 |
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Posted: 28 May 2019 at 10:26am |
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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 |
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ADVenturePO
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Joined: 26 May 2019 Status: Offline Points: 4 |
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Posted: 28 May 2019 at 2:46pm |
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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 |
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