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 Post subject: PWM fan controller?
PostPosted: Tue Oct 16, 2012 10:34 am 
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Joined: Sat Jul 10, 2004 12:24 pm
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Location: US
Does anyone make a PWM fan controller? Preferably one that controls 3-4 fans.

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Case: Fractal Design Define Mini Fans: 2 x FD 120mm front, Scythe 120mm PWM rear Power Supply: SeaSonic M12II 620


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 Post subject: Re: PWM fan controller?
PostPosted: Tue Oct 16, 2012 1:02 pm 
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Most hardware shops offer at least a couple. Cheapest multi-ch unit I've seen is a 6-ch one by Logisys.

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 Post subject: Re: PWM fan controller?
PostPosted: Tue Oct 16, 2012 1:16 pm 
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Joined: Mon Oct 01, 2012 9:44 am
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JJ wrote:
Does anyone make a PWM fan controller? Preferably one the controls 3-4 fans.
Why would you want one? PWM fans are fully compatible with normal 3-pin fan controllers, in case you didn't know, and will probably be comparably power/heat efficient if they don't use rheostats.

And if you're just out of places to plug in your fans, an aux-powered splitter cable will let you power and software-control an effectively unlimited number of fans from a single PWM header.

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 Post subject: Re: PWM fan controller?
PostPosted: Thu Oct 18, 2012 12:21 pm 
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Why would you NOT want to control PWM fans via PWM?

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Motherboard: ASUS P8Z77-M PRO CPU: Intel i5-3750K CPU Cooler: Scythe Mugen 3 Rev.B Memory: G.Skill Ares DDR3 1600 16 GB
Boot Drive: Samsung 830 SSD 128 GB Work Drive: WDC WD1001FALS 1 TB 7200 RPM Optical Drive: Samsung SH-222BB DVD-RW
Case: Fractal Design Define Mini Fans: 2 x FD 120mm front, Scythe 120mm PWM rear Power Supply: SeaSonic M12II 620


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 Post subject: Re: PWM fan controller?
PostPosted: Sun Oct 21, 2012 7:08 am 
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Joined: Tue Oct 04, 2005 6:10 am
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Because you don't have enough PWM headers.


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 Post subject: Re: PWM fan controller?
PostPosted: Sun Oct 21, 2012 12:21 pm 
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Location: UK
A PWM fan splitter like the Rosewill Model RCW-FPS-401 from Newegg is one solution to limited headers. Only the control signal is taken from the CPU header; all the fans on the chain are powered direct from the PSU. Is also inexpensive at around $4.


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 Post subject: Re: PWM fan controller?
PostPosted: Sun Oct 21, 2012 5:40 pm 
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Location: US
I'm surprised that there aren't more card-type controllers so that you have intelligent software control instead of manually diddling knobs to set fan speeds.

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Boot Drive: Samsung 830 SSD 128 GB Work Drive: WDC WD1001FALS 1 TB 7200 RPM Optical Drive: Samsung SH-222BB DVD-RW
Case: Fractal Design Define Mini Fans: 2 x FD 120mm front, Scythe 120mm PWM rear Power Supply: SeaSonic M12II 620


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 Post subject: Re: PWM fan controller?
PostPosted: Mon Oct 22, 2012 8:48 am 
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lodestar wrote:
A PWM fan splitter

Then there's no rpm monitoring is there?


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 Post subject: Re: PWM fan controller?
PostPosted: Mon Oct 22, 2012 8:59 am 
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Joined: Sat Jul 10, 2004 12:24 pm
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Location: US
Olaf van der Spek wrote:
lodestar wrote:
A PWM fan splitter

Then there's no rpm monitoring is there?

The way I've seen most of them work is that one fan on the splitter would still be connected to the PWM monitoring pin of the fan header, so there is monitoring of that fan. To some extent it assumes that all the fans you're using are the same (although they don't have to be) and would therefore all be running at the same speed.

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Motherboard: ASUS P8Z77-M PRO CPU: Intel i5-3750K CPU Cooler: Scythe Mugen 3 Rev.B Memory: G.Skill Ares DDR3 1600 16 GB
Boot Drive: Samsung 830 SSD 128 GB Work Drive: WDC WD1001FALS 1 TB 7200 RPM Optical Drive: Samsung SH-222BB DVD-RW
Case: Fractal Design Define Mini Fans: 2 x FD 120mm front, Scythe 120mm PWM rear Power Supply: SeaSonic M12II 620


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