[mythtv-users] Quiet fans

Raphael rpooser at gmail.com
Wed Oct 15 00:41:03 UTC 2008

Greg Grotsky wrote:
> On Fri, Oct 10, 2008 at 8:08 AM, xavier hervy 
> <xavier.hervy at bluebottle.com <mailto:xavier.hervy at bluebottle.com>> wrote:
>     I use fancontrol on ubuntu to control the fan. it is a deamon which
>     change the fan speed according to the current temperature.
>     I does us lm_sensors
>     Xavier
> I just set this up on my machine and it works wonderfully.  Just install 
> lm-sensors, set up the details for your motherboard using the 
> 'sensors-detect' script, then run 'pwmconfig' to assign each fan hookup 
> on your motherboard to a thermistor temperature sensor output.  You can 
> define all the values for increasing the fan speed in increments if you 
> want.
> My machine is whisper quiet with this enabled... much louder when I 
> disable it and it sets all the fans to default top-speed.
> -Greg
> ------------------------------------------------------------------------

If you have a motherboard which is more than two years old, like me, 
chances are none of your ports are PWM controlled and they simply put 
out a constant 12V (three pin connector) or only the processor fan 
header has PWM. In that case if you really want PWM control there's an 
easy howto I used from bit-tech: 

I've built several of these and quieted down some really noisy fans this 
way. If you decide to put in a thermistor for auto temperature control 
make sure you put one in that will actually give a significant percent 
difference resistance change over the temperature range you're 
interested in.
I've used this and the 7v trick along with straight wiring to 5v.

If you want the end-all, be-all absolutely easiest solution to quiet 
down your fans, Antec tri-cool fans set to the lowest setting are for 
you. http://www.antec.com/usa/productDetails.php?lan=us&id=75080
They aren't the most quiet you can possibly find anywhere, but compared 
to what you're hearing now you're going to think they're silent, and 
they're good for the price.


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