AMD Motherboards - X570 Steel Legend CPU

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X570 Steel Legend CPU_FAN1/2 broken

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=19488
Printed Date: 08 Aug 2025 at 6:58am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: X570 Steel Legend CPU_FAN1/2 broken

Posted By: ezakimak
Subject: X570 Steel Legend CPU_FAN1/2 broken
Date Posted: 29 Aug 2021 at 4:43pm

There seems to be a bug with how the motherboard handles CPU_FAN1 and CPU_FAN2.

I can plug in a 4-pin fan to either by itself, and it works just fine.
I can plug in a 3-pin fan to either by itself, and it works just fine.

However, if I plug in a 3-pin fan and a 4-pin fan at the same time to CPU_FAN1 and CPU_FAN2, regardless of which one is which, the 3-pin fan spins but the 4-pin fan will not spin at all--no setting in the motherboard will change it.

Replies:

Posted By: ezakimak
Date Posted: 29 Aug 2021 at 4:44pm

This is with the latest bios 3.80.