Intel Motherboards - Asrock Z370 Pro4

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Asrock Z370 Pro4 - Chassis Fan

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=25232
Printed Date: 03 May 2024 at 10:43am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: Asrock Z370 Pro4 - Chassis Fan

Posted By: mateuszsokol
Subject: Asrock Z370 Pro4 - Chassis Fan
Date Posted: 24 Dec 2022 at 5:02am

Hi everyone,
I have some questions about the Chassis Fan connectors on my motherboard. If I connect a 3 pin fan to one of these connectors, will I be able to control its speed in the bios? Or maybe fan must be 4 pin? And the last question is can I connect the fan controller to chassis fan connector and control several fans?

Replies:

Posted By: threadzipper1957
Date Posted: 21 Jun 2023 at 10:25pm

3 Pin fans have the following layout
1. Ground
2. variable voltage up to 12 Volt
3. RPM sensor

4 pins fans have a different layout
1. Ground
2. Fixed 12Volt
3. RPM sensor
4. PWMJ steering, so the pulse frequency sets the fan speed.
A lot of 3 pin fans run at full speed because of the fixed 12 volt, when using a 4Pin header

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Kind Regards