Re: [opensuse] Unstable system - who is the culprit? Rajko M. wrote:
> On Sunday 17 February 2008 05:10:55 am Basil Chupin wrote:
>>> I started using after-market fans several years ago for both
>>> better cooling and lower (quieter) fan-speeds that result from
>>> using larger-diameter fans.
>> The bigger diameter of the fan the bigger diameter is the spindle, the
>> bigger is the 'dead spot' where no air is being blown -- and this is
>> also the where the heat-dissipating part of the cpu under the heatsink
>> is located.
> 
> With small fans used in computer the spindle (motor, bearings) is usually the 
> same or almost the same size. The trick is that bigger diameter propeller 
> will rotate slower with the same size motor anyway, but due to better 
> efficiency of longer blades it will blow more air instead of blowing user ear 
> drums. Second, I haven't seen CPU cooling solution with bigger fan and no 
> funnel to keep that air flowing to CPU, not somewhere in that direction.
> 

Many don't have a funnel, but they have a long-enough stand-off
that the dead-spot doesn't reach the heat sink anyways.


