AMD Motherboards - X370 Taichi 5.10 BIOS CPU

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X370 Taichi 5.10 BIOS CPU_OPT DC mode issue

Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=10547
Printed Date: 13 Sep 2025 at 7:12am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: X370 Taichi 5.10 BIOS CPU_OPT DC mode issue

Posted By: garych
Subject: X370 Taichi 5.10 BIOS CPU_OPT DC mode issue
Date Posted: 28 Dec 2018 at 7:27pm

For some reason after switching from 3.20 to 5.10 bios, when I have CPU_OPT fan set to DC mode, if I start the PC from powerless state (PSU off), the mobo will shutdown before POST screen and then boot itself normally.
That doesn't happen with Chassis Fan 3, which also has manual PWM/DC mode switch.

Replies:

Posted By: howardstern
Date Posted: 29 Dec 2018 at 5:48am

looks like you flashed the bios wrong to start with.
* If the current BIOS version is older than P3.30, please update BIOS to P3.30 (Bridge BIOS) before updating this version.

Not sure its makes any difference or if it will fix your issue if flashed correctly.

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Taichi
Ryzen 1800X @ 4G
EVGA GTX 1080
Corsair H100i AIO and full tower 780T
GSkill FlareX 3200
SB ZX
Windows 10

Posted By: garych
Date Posted: 29 Dec 2018 at 4:55pm

Of course I flashed the P3.30 BIOS first, I just didn't mention it because it seemed like an obvious routine.

Posted By: garych
Date Posted: 29 Dec 2018 at 9:45pm

If I was up to updating directly to 5.10 I wouldn't even be able to choose it, it won't show up in the list until you update to 3.30.