Ultra-quiet PC colling; a different approach.

[Rob]

Well, just wanted to say that moving the powersupply fan to the inside part of the powersupply not only lowered the noise by about 10db @ 1m but it ALSO lowered the temperature by about 10 degrees F! BTW, I also put 10 turn 1k pots on the cpu fan and the powersupply fan and lowered the speed a little and it still managed to increase the cooling ability. I will have to see how much the temp drops with the fans at full speed.
Well, I guess those guys at Gateway really know their stuff.

Now, I will put some singled sided stickly foam to absorb some of the noise.

Rob

BTW, don't use peltier junctions. I havent heard any good things about using them in moist climes.
They have a new unit that is sealed somehow to prevent moisture. Look into it.



-----Original Message-----
From:	Theo Hogers [SMTP:t.hogers at home.nl]
Sent:	Thursday, March 09, 2000 7:54 PM
To:	alex hadley; synth-diy at node12b53.a2000.nl
Subject:	Re: Ultra-quiet PC colling; a different approach.

Hi Rob, Alex and others,

moving the sounds like a good solution I'm gonna try it soon...

There is another appoach,
remember those cabinets where you could put you matrix printer in to muffle
the sound?
The same system works quite good on a computer, I used it on a XT.
Bassicaly it's a box made of MDF with acousic foam on the inside.
Its to big to sit on my desktop but if room is not the problem you might
consider this option..
You don't want to obstruct air flow, air input is best on the lower front
side, output direct behind the fan.
To kill the fan noise, I used the stuf they use as fat filter in kitchen
fans, about 4 layers works fine.
XTs don't produce the amount of heat modern PC do, maybe heat can become a
problem.

Cheers Theo.


----- Original Message -----
From: alex hadley <fourply69 at hotmail.com>
To: <synth-diy at node12b53.a2000.nl>
Sent: Thursday, March 09, 2000 2:35 PM
Subject: Ultra-quiet PC colling; a different approach.


> hello,
>
> We have recently been looking into cheap and cheerfull ways of making our
> server, which resides in the dinig room, shut up.  As far as fan noise
goes,
> we first tried just a 10W peltier effect device between the processor and
> heatsink, but it didn't pump enough heat and we had some strange crashes.
> We then placed a fan running on 5v (much quieter than 12v) on the heat
sink
> and it all seems to be running fine and quietly.
>
> As far as hard drive noise goes, someone has suggested trying to hang the
HD
> in the case with rubber bands or something similar.  We haven't tried it
yet
> but we'll see how it goes.
>
> All this may not be as effective as liquid cooling but it is certainly a
lot
> safer and less hassle.  Hope it gives you all some ideas.
>
> Alex.
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