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> -----Original Message-----
> From: Mark Jurik [mailto:mark@xxxxxxxxxxxx]
> Sent: Wednesday, January 29, 2003 11:02 PM
> To: 'Omega List'
> Subject: RE: quiet cpu fan (extreme)
>
>
> Gary,
>
> The Pabst brand was my first choice, until I discovered
> Noiseblocker. The slow RPM model of the Pabst at 12dB is extremely
> quiet and good for case cooling. But that speed would be too weak to
> force sufficient air through a heatsink. The faster Pabst fans are
> stronger, but reportedly noisier than their specs suggest. A review
> I read on one German website stated only the Noiseblocker's specs
> test to be as good as advertised (or something like that.)
>
Good to know. I'm uncertain though, as to the required capacity of an HSF (in
CFM). For example, in this review
http://www.myworld.com.my/review/hsf/coolermaster/5.html
of Coolmaster heat sinks, three different fan configurations are shown, and the
(60 cm) fans are shown with a range of 13-21 cfm. At about 20cfm, the slow
speed Pabst falls right in the range. The noise range shown was 33-37 db; at 12
db the Pabst is about 4x quieter.
Those tests were performed on an Athlon 850Mhz CPU; mileage would vary, but it
wouldn't suprise me to find that a 20 cfm 80 cm HSF works fine (or at least
okay) with an Athlon XP cpu.
> Ultimately, what matters to me is how well a fan, at a particular
> noise level, can cool a CPU. Cooling requires forcing air through a
> heatsink, which means the fan needs to create high static pressure.
> Some manufacturers publish that information (Pabst does) and some
> don't. So the only real way to know is to buy a bunch and test them
> out on the heatsink at hand and record the CPU temp.
>
Agreed. I look forward to hearing what you find out.
thanks - Gary
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