Intel Motherboards - Z370m-itx/ac

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Z370m-itx/ac - PWM not working

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=8112
Printed Date: 05 Aug 2025 at 6:40pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: Z370m-itx/ac - PWM not working

Posted By: openupitsdave
Subject: Z370m-itx/ac - PWM not working
Date Posted: 19 Mar 2018 at 7:44am

" rel="nofollow - I have 2x Arctic F8 PWM fans connected to a splitter which connects to CHA_FAN1. I try to make adjustments in bios but the fans spin full speed when set to PWM. In DC mode, I have to set it to Standard but it just stays at a static rpm...Performance mode or SIlent modes do not work.

Can this be fixed with a future bios update?

Replies:

Posted By: wardog
Date Posted: 19 Mar 2018 at 8:01am

I'm of the understanding No. And the splitter is the reason.

Not that a signal cannot be "sent' UP the splitter to the fans, but that the IC responsible does NOT like seeing BOTH fans signal come back.