ASRock Forums : Problem with 3 pin fans https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Sun, 17 May 2026 01:36:17 +0000 Wed, 08 Nov 2017 14:46:04 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=6537 <![CDATA[ASRock Forums]]> https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ <![CDATA[Problem with 3 pin fans : Dear Johusan,Greetings, this is...]]> https://forum.asrock.com/forum_posts.asp?TID=6537&PID=39042&title=problem-with-3-pin-fans#39042 Author: ASRock_TSD
Subject: 6537
Posted: 08 Nov 2017 at 2:46pm

Dear Johusan,

Greetings, this is ASRock TSD.


For this case, we tested on AB350M Pro4 with BIOS P3.10.
Install two 3-pin chassis fans on CHA_FAN1 and CHA_FAN2.
The fan speed are both under range and they also spin properly on the system.
 
So we would like to provide some suggestions for verifying:
1. Please refer to the user manual to clear CMOS.(Page 27)
    Link: http://asrock.pc.cdn.bitgravity.com/Manual/AB350M%20Pro4.pdf
2. Please re-flash BIOS P3.10 again.
    Link: http://www.asrock.com/MB/AMD/AB350M%20Pro4/index.asp#BIOS
3. If possible, please change another 3-pin fan for verifying.
4. If possible, please install the fan to another system for verifying.


Thanks!

All the best,
ASRock TSD

]]> Wed, 08 Nov 2017 14:46:04 +0000 https://forum.asrock.com/forum_posts.asp?TID=6537&PID=39042&title=problem-with-3-pin-fans#39042 <![CDATA[Problem with 3 pin fans : Greetings, My problem is:Whenever...]]> https://forum.asrock.com/forum_posts.asp?TID=6537&PID=39040&title=problem-with-3-pin-fans#39040 Author: Johusan
Subject: 6537
Posted: 08 Nov 2017 at 2:20pm

Greetings, My problem is: 

Whenever I plug a 3 pin fan on the AB350M Pro4 (CHA_FAN1 or CHA_FAN2) it gets crazy, up and down, with peaks of 50.000 rpm.

I know that cannot get same control from a 3 pin fan than from a 4 pin, but that speed is too much, it stays at +-3.000rpm with peaks of 50.000rpm and I checked these numbers on UEFI, Aida64, Speedfan, HWiNFO64, etc

I updated UEFI to 3.10, I load UEFI default, I changed the customize valors for chassis fan on UEFI. But always same result. 
I cannot plug any 3 pin fan because it's gonna break and it is very noisy. 

What can I do? Thanks.

]]> Wed, 08 Nov 2017 14:20:19 +0000 https://forum.asrock.com/forum_posts.asp?TID=6537&PID=39040&title=problem-with-3-pin-fans#39040