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 Post subject: ASRock z77 Extreme4 Fan header question
PostPosted: Sun Nov 11, 2012 3:44 pm 
8086
8086

Joined: Mon Aug 11, 2008 8:33 am
Posts: 22
Hello all, I have a question about fan headers
I built a new computer, with this motherboard, Cooler and case. (Intel Core i5 3570K)

ASRock Z77 extreme4
http://www.newegg.com/Product/Product.a ... 6813157293
Silverstone FT-02 (nice case!)
Noctua NH-D14 (that cooler is huge)

I plugged the Noctua fans (two included) into a y cable that was included (3pin) and plugged it into CPU Fan2 header. The fans will run at 700 when cpu is cold and spin up to 1300 or so when hot. This is the expected behavior

Unfortunatly I plug the top chasiss fan into the Chassis Fan1 header (3pin) and the fan never changes speed from 1300 rpm or so. I would like to slow this fan down, and the mother board says you can, but no matter what settings I use I can not slow it down.

Any thoughts?

The rest of the build is an msi 660ti video card, 250gb samsung sd, Corsair 650 gold modular power supply. I tossed in a cheap dvd burner and a 2tb samsung drive as well. I am loving this build so far and plan to overclock when I get bored :)


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 Post subject: Re: ASRock z77 Extreme4 Fan header question
PostPosted: Mon Nov 12, 2012 3:22 pm 
Clawhammer
Clawhammer
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Joined: Fri Sep 23, 2005 6:22 pm
Posts: 4406
Location: In the closet
CPU fan with 4-pin connector, connected to CPU FAN header on the motherboard, will enable the BIOS / motherboard software to control fan speed based on temperature. 3 pin fans only allow the motherboard to monitor the speed of the fan. The fourth line on a 4 pin header fan allows the motherboard to control the fan. Since you want to control, you want to a 4-pin fan but if your CHA (chassis fan) is only a 3-pin, your sol.


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 Post subject: Re: ASRock z77 Extreme4 Fan header question
PostPosted: Mon Nov 12, 2012 3:25 pm 
Clawhammer
Clawhammer

Joined: Sun Jun 18, 2006 7:37 pm
Posts: 4553
There's no motherboard utility that will allow you to do this? Or some BIOS setting?

You can slow them down, but not with a PWM. It would be with voltage control.


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