On 01/05/12 22:43, Tim Brocklehurst wrote:
> That one looks interesting. There are some other (more monolithic) blocks with
> larger fans.
>
> The reason for looking to large diameter fans is to move the same amount of
> air with much reduced noise. There are some very detailed explanations of why
> this happens on the web, if you are particulary interested in this aspect
> (essentially, you operate a larger blade at lower lift, thereby reducing the
> vortex strength).
I used something similar a few years back and whilst it will in all 
likelihood sound far less obtrusive in terms of noise than your current 
setup, you will still hear it.
Further to the technical explanation above, these are desirable for the 
same reason most case manufacturers shy away from tiny fans these days: 
they are far less 'whiny' and some are supplied with a means of stepping 
the speed up or down according to your needs. I never used mine above 
low setting, even when gaming.
Speaking of small whiny fans, make sure your graphics card is not 
contributing to the noise, as these often contribute to the racket and 
there are plenty of fanless alternatives out there if you don't intend 
to do anything fancy graphics-wise, save perhaps power a couple of big 
screens.
For something really quiet look at the Shuttle X35, as with an SSD in 
there it is silent. A mate has one an rants about it as it makes his 
water-cooled gaming beast sound noisey by comparison. The onboard 
graphics solution powers his two monster displays to their proper 
resolution effortlessly by the way.
Sean
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