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low fan speed

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=1064
Printed Date: 23 Dec 2024 at 6:39am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com


Topic: low fan speed
Posted By: Joe America
Subject: low fan speed
Date Posted: 21 Oct 2015 at 4:16am
ASRock Extreme4/3.1

I'm using some 3 pin fans on a Corsair H110 radiator.

the CPU fan #1 seems to get a full voltage and the speed the motherboard reports is 1200 RPM ( which is what the fan was rated for ).

however, CPU fan 2 seems to run at 980 RPM. I tried it in Chassis Fan #3 and got the same results.

if I switch the fans I get the same results, so CPU Fan #2 voltage output is low, Chassis Fan #3 output voltage is low.

I tried changing BIOS fan settings to 100% but that didn't do anything.

any ideas why my second fan won't run at 1200 RPM ?
( it does if connected to CPU fan #1 ) ?


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