[mythtv-users] Quiet fans

[Raphael]

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: 
http://www.bit-tech.net/modding/2001/12/03/pwm_fan_controller/1

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.

raphy