"badgolferman" <REMOVETHISbadgolfer***@gmail.com> wrote in message
news:xn0e0kba3sglh001@news.aioe.org...
>I have just upgraded my computer from a 800 MHz AMD Duron to a 2.0 GHz
> Intel based motherboard.  The computer is very noisy where it has a
> sort of whine coming from the CPU fan.  At least that is the only way I
> can quiet it is to stop the fan momentarily.
>
> I have replaced the stock Intel fan with a heavy brass heat sink/fan
> combination from Thermaltake (sp?) and it varied the whine pitch
> slightly.  I have tried wiggling and pushing the motherboard and
> internal components to find signs of vibration.  I have also covered up
> external air holes to see if a whistling action is being created.  I
> have put a pieces of felt beneath it to dampen any floor vibrations.
> The computer sits on hardwood floor and has plenty of ventilation.
>
> Nothing seems to stand out for the cause of the whining sound.  Can
> anyone give me any other ideas?  Thanks.
>
> --
> No matter what happens someone will find a way to take it too seriously.

>I have just upgraded my computer from a 800 MHz AMD Duron to a 2.0 GHz
>Intel based motherboard.  The computer is very noisy where it has a
>sort of whine coming from the CPU fan.  At least that is the only way I
>can quiet it is to stop the fan momentarily.
>
>I have replaced the stock Intel fan with a heavy brass heat sink/fan
>combination from Thermaltake (sp?) and it varied the whine pitch
>slightly.  I have tried wiggling and pushing the motherboard and
>internal components to find signs of vibration.  I have also covered up
>external air holes to see if a whistling action is being created.  I
>have put a pieces of felt beneath it to dampen any floor vibrations.
>The computer sits on hardwood floor and has plenty of ventilation.
>
>Nothing seems to stand out for the cause of the whining sound.  Can
>anyone give me any other ideas?  Thanks.

> On Sun, 3 Apr 2005 17:48:59 +0000 (UTC), "badgolferman"
> <REMOVETHISbadgolfer***@gmail.com> wrote:
>
> > I have just upgraded my computer from a 800 MHz AMD Duron to a 2.0
> > GHz Intel based motherboard.  The computer is very noisy where it
> > has a sort of whine coming from the CPU fan.  At least that is the
> > only way I can quiet it is to stop the fan momentarily.
> >
> > I have replaced the stock Intel fan with a heavy brass heat sink/fan
> > combination from Thermaltake (sp?) and it varied the whine pitch
> > slightly.  I have tried wiggling and pushing the motherboard and
> > internal components to find signs of vibration.  I have also
> > covered up external air holes to see if a whistling action is being
> > created.  I have put a pieces of felt beneath it to dampen any
> > floor vibrations.  The computer sits on hardwood floor and has
> > plenty of ventilation.
> >
> > Nothing seems to stand out for the cause of the whining sound.  Can
> > anyone give me any other ideas?  Thanks.
>
>
> If the whining subsided when you stopped the fan it seems
> pretty clear what made the noise... that your new fan makes
> similar noise might be just bad luck?  Generally a
> ball-bearing fan will always have a certain degree of
> 'whine' though much less so when at low RPM.  Thus you have
> to decide if you want the (typical) longer lifespan and
> reliability of a ball-bearing fan or can accept the tradeoff
> of shorter life for a sleeve-bearing fan (or pay premium
> prices for the good sleeve bearing fans like Panaflo or
> Papst).  Ideally a Panaflo 25mm thick by whatever diameter
> is called for on your new heatsink, would be the best
> option.  They speed-grade them too so you'd want an "L" (for
> "low") in the model name, not "M" or "H", etc.
>
> So for example if you need an 80mm fan, the part # would be
> FBA08A12L
> or for a 92mm,
> FBA09A12L
>
> Note that some don't have the appropriate motherboard fan
> header connector, it is an option that must be mentioned by
> seller.  Also there are other potential sources of whining
> noise like motherboard inductors (typically look like
> doughnut-shaped painted magnets (actually just ferrite)
> wrapped in thick wire), which might quiet down if you firmly
> grasp it between both fingers (as only a test to isolate the
> noise).

> On Mon, 4 Apr 2005 02:36:51 +0000 (UTC), "badgolferman"
> <REMOVETHISbadgolfer***@gmail.com> wrote:
>
>
> > I have a Socket 478 Biostar motherboard.  Are you saying a sleeve
> > type fan is quieter than a ball-bearing type?  I'm sure the
> > Thermaltake is a ball-bearing.  The stock Intel one I don't know
> > about.
>
> The stock fans are usually ball-bearing too.  Sleeve bearing
> fans certainly make noise still but not that high-pitched
> whine (usually, sometimes a motherboard fan controller can
> cause it too but not so often).  The sleeve-bearing itself
> is relatively quiet and the noise tends to be only in the
> lower frequencies.  If you just randomly chose a
> sleeve-bearing fan you could expect it to have a much
> shorter lifespan, particularly in an environment where
> there's heat like atop a heatsink.
>