FAQ FAQ  Forum Search   Register Register  Login Login

CPU fan speed control not working

Post Date: 2017-11-10
 Post Reply Post Reply
Author
  Topic Search Topic Search  Topic Options Topic Options
quickxotica View Drop Down
Newbie
Newbie

Email address used to purchase matched with forums account email.

Joined: 25 Nov 2011
Online Status: Offline
Posts: 17 		  Quote quickxotica Quote  Post ReplyReply bullet Topic: CPU fan speed control not working
    Posted: 10 Nov 2017 at 11:14am
My DS-built coolermaster 942 HAF X tower is several years old and the CPU fans have always run constant 1,960 rpms (+/-) whenever the machine is on. The noise hasn't bothered me until recently, when I moved the machine to a new room where I need it to run much quieter, especially when the CPU is unstressed (normal PC usage).

The case fans are large and all run at much lower/quieter rpms, so no adjustment needed there.

I have tried to use several different BIOS settings and a free Speedcontrol app to adjust the CPU fan speeds/profiles, but nothing I do seems to have any effect at all. It's like the CPU fans are defaulted to full speed and won't accept an override from BIOS or anywhere else. The CPU fans are Corsairs plugged directly into the MB, which is an ASUS P8P67.

What am I missing???

Thanks in advance.
Back to Top
bprat22 View Drop Down
DS ELITE
DS ELITE

DigitalStorm East -- (Unofficially!)
Email address used to purchase matched with forums account email.

Joined: 08 Jun 2011
Online Status: Offline
Posts: 20391 		  Quote bprat22 Quote  Post ReplyReply bullet Posted: 10 Nov 2017 at 12:01pm
To adjust fans to one of the presets, like normal, turbo, quiet, etc I believe you need to enable Q fan control in Bios first.

If the fan has 3 pin connectors then you might be able to change the speed to a preset but not have the fans adjust to a difference in temps as in a fan curve. That would take a 4 pin fan plugged into a 4 pin header on the mobo.    

Your mobo manual has a section that explains what’s available with your particular mobo.

Hope this helps.
Back to Top
quickxotica View Drop Down
Newbie
Newbie

Email address used to purchase matched with forums account email.

Joined: 25 Nov 2011
Online Status: Offline
Posts: 17 		  Quote quickxotica Quote  Post ReplyReply bullet Posted: 10 Nov 2017 at 12:22pm
Thank for the reply. I did already enable Q fan control in BIOS, and then tried the 'Silent' preset as well as (when that did nothing) a manual setting with lower fan curves. After saving each of these new settings and restarting, nothing changed; the CPU fans were still spinning at 1900 rpm regardless of which method I tried.

I don't recall if the fan connectors are 3 or 4 pin. I'll check that out. Any other ideas, anyone?
Back to Top
bprat22 View Drop Down
DS ELITE
DS ELITE

DigitalStorm East -- (Unofficially!)
Email address used to purchase matched with forums account email.

Joined: 08 Jun 2011
Online Status: Offline
Posts: 20391 		  Quote bprat22 Quote  Post ReplyReply bullet Posted: 10 Nov 2017 at 12:41pm
A 3 pin fan is voltage controlled and a 4 pin is Pwm controlled.     Check the mobo header your fan is plugged into and check the manual that the header will voltage control if a 3 pin.

You might have to select voltage control in the Monitor section of Bios.   

What cooler do you have ?

Back to Top
quickxotica View Drop Down
Newbie
Newbie

Email address used to purchase matched with forums account email.

Joined: 25 Nov 2011
Online Status: Offline
Posts: 17 		  Quote quickxotica Quote  Post ReplyReply bullet Posted: 10 Nov 2017 at 1:18pm
The cooler: "Corsair A70 Dual 120mm Fans High Performance Cooler."

This build is from 2012.
Back to Top
bprat22 View Drop Down
DS ELITE
DS ELITE

DigitalStorm East -- (Unofficially!)
Email address used to purchase matched with forums account email.

Joined: 08 Jun 2011
Online Status: Offline
Posts: 20391 		  Quote bprat22 Quote  Post ReplyReply bullet Posted: 10 Nov 2017 at 1:54pm
I have the Corsair A70 also. Real nice cooler that’s still cranking after 6 years.   Mine runs at full rpm with little or no noise. I wouldn’t adjust it myself, wanting to keep the cooling up for my 4.4 overclock at 1.4 vcore.   

Wonder if you have a bad fan.
Back to Top
bprat22 View Drop Down
DS ELITE
DS ELITE

DigitalStorm East -- (Unofficially!)
Email address used to purchase matched with forums account email.

Joined: 08 Jun 2011
Online Status: Offline
Posts: 20391 		  Quote bprat22 Quote  Post ReplyReply bullet Posted: 10 Nov 2017 at 2:02pm
FYI... the A70 fans are 3 pin and originally came with speed reduction adapters if you wanted to drop rpm from 2100 to 1600 or so.    The speed reduction adapter is a cable that goes between the mobo header and the fans plug.    The adapter has a resistor molded into it to drop voltage to the fan.

If you can’t find the adapters from years ago, Amazon has them for cheap.

Back to Top
quickxotica View Drop Down
Newbie
Newbie

Email address used to purchase matched with forums account email.

Joined: 25 Nov 2011
Online Status: Offline
Posts: 17 		  Quote quickxotica Quote  Post ReplyReply bullet Posted: 10 Nov 2017 at 2:08pm
Thank you for the help! I will dig out the box of spares that shipped with my machine and see if I can find those voltage-reducing cables. That might be just the thing.

Cheers!
Back to Top
bprat22 View Drop Down
DS ELITE
DS ELITE

DigitalStorm East -- (Unofficially!)
Email address used to purchase matched with forums account email.

Joined: 08 Jun 2011
Online Status: Offline
Posts: 20391 		  Quote bprat22 Quote  Post ReplyReply bullet Posted: 10 Nov 2017 at 2:29pm
Cheers.    Let us know.   
Back to Top
hoserator View Drop Down
DS Veteran
DS Veteran

We don't need no stinking "Avatars" !
Email address used to purchase matched with forums account email.

Joined: 08 Oct 2014
Online Status: Offline
Posts: 7966 		  Quote hoserator Quote  Post ReplyReply bullet Posted: 11 Nov 2017 at 2:54am
What does bprat22 not know? Crazy


Awesome
Back to Top
Tidgxor View Drop Down
DS ELITE
DS ELITE

The Kokopelli kid
Email address used to purchase matched with forums account email.

Joined: 17 Sep 2010
Online Status: Offline
Posts: 13000 		  Quote Tidgxor Quote  Post ReplyReply bullet Posted: 11 Nov 2017 at 8:11am
Originally posted by hoserator

What does bprat22 not know? Crazy


Awesome


What I had for breakfast. Big%20Smile
My Two Digital Storm Rigs: Mr. Bojangles (HAF-X, 2010) & Mrs. Bojingles (Bolt I, 2013).
Back to Top
bprat22 View Drop Down
DS ELITE
DS ELITE

DigitalStorm East -- (Unofficially!)
Email address used to purchase matched with forums account email.

Joined: 08 Jun 2011
Online Status: Offline
Posts: 20391 		  Quote bprat22 Quote  Post ReplyReply bullet Posted: 11 Nov 2017 at 8:15am
Originally posted by Tidgxor

Originally posted by hoserator

What does bprat22 not know? Crazy


Awesome


What I had for breakfast. Big%20Smile


Hafragrautur and Lysi ?    Hahaha
Back to Top
Tidgxor View Drop Down
DS ELITE
DS ELITE

The Kokopelli kid
Email address used to purchase matched with forums account email.

Joined: 17 Sep 2010
Online Status: Offline
Posts: 13000 		  Quote Tidgxor Quote  Post ReplyReply bullet Posted: 11 Nov 2017 at 8:23am
That's wizardry right there.  LOL
My Two Digital Storm Rigs: Mr. Bojangles (HAF-X, 2010) & Mrs. Bojingles (Bolt I, 2013).
Back to Top
hoserator View Drop Down
DS Veteran
DS Veteran

We don't need no stinking "Avatars" !
Email address used to purchase matched with forums account email.

Joined: 08 Oct 2014
Online Status: Offline
Posts: 7966 		  Quote hoserator Quote  Post ReplyReply bullet Posted: 11 Nov 2017 at 12:26pm
.LOLLOLBig%20Smile

Edited by hoserator - 11 Nov 2017 at 12:26pm
Back to Top
 Post Reply Post Reply

Forum Jump Forum Permissions View Drop Down



This page was generated in 0.0546875 seconds.