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Re: Passively coole CPU

Somewhere on teh intarweb "kony" typed:
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LOL. Kony, all I see is a bunch of your posts, thought you were having a
conversation with yourself. Then I had a look and figured maybe I'd
killfiled this guy at some stage. Now I see why. :-)

Have fun.

Re: Passively coole CPU

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Well you're the "~misfit~".  Why don't you killfile yourself "?"

Re: Passively coole CPU

On Sun, 30 Mar 2008 23:02:42 +1300, "~misfit~"

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You have actually found that those texts you don't like can
continue in your sight even after the source is killfiled
off.  ;-)

The noise is obviously driving him mad.

Re: Passively coole CPU

Somewhere on teh intarweb "kony" typed:
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I'd put that in the past tense personally. <g>


Re: Passively coole CPU

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That is not true - I don't know the names but there are a couple of fanless
Core2 coolers - I think one is a 'gemini' something or other. They recommend
a 120mm fan and has space on its large flat surface for 2x120mm fans, but
they work without fans, provided the ambient temp is low enough. However, to
ensure a low enough case temp, you need case airflow, or in other words

Re: Passively coole CPU

On Wed, 26 Mar 2008 10:08:02 -0000, "GT"

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Yes, exactly.  You could take most of the heatpiped 'sinks
and put them in a case with a 120mm fan directly behind it,
then made a duct a-la-Dell and that'd be enough to cool most
Core2s at stock speed & voltage, even more easily with an

Re: Passively coole CPU

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I can`t comment that much on fanless cases. (there were some even in
2003, and prob are more now).


Your information is out of date.

The Intel Core 2 Duo range includes a "ULV" range.  Ultra low voltage.
They are extremely low in watts.

They are intended to be passively cooled..
The only question I would have about those, is where to get a
heatsink.. (there weren`t that many places selling them last time I

These very low power processors are ideal for noiseless computers.
Apparently there have been low power processors in the past too..

Many fanless laptops are using these processors.

Furthermore, around 2003, fanless heatsinks were produced for the fast
processors of the time.  I remember the picture of the first one.  It
was the time of P4 processors and AMD Athlon XP processors.. They
cooled fast P4s up to around 2GHz northwood ones.   They had an issue
though - they were so big.  If you had a case they might have been too
big for it.  (and a case can help silence a noisy hard drive!)

Prob 2003 too, you had what I think was the first fanless full size /
ATX PSU, it was by silentmaxx.   Now many makes make them.  I don`t
know how reliable they are but with many manufactureres making them,
they may be ok.

I built a fanless machine,  A VIA miniitx motherboard, in 2003.. Had
the processor built into it. That was passively cooled.  But the
"power supply card"(with ACDC adaptor) made a high pitched noise. And
I could not bare using it - the card made a high pitched noise -
transformers.   But now I can finally use it since the PicoPSU came
out. That is noiseless  - no high pitched noise. And no fans of
course. I bought it off a guy on ebay whose flatmate could hear high
pitched noises from some TVs(like I can) , and he said that this
device did not produce them.
You can run a motherboard outside the case.  I ran that one outside
the case.

Those VIA boards had low specced processors. But now with Core 2 Duo,
you have fast, low power processors being made..

With stateless hard drives, they are now noiseless - apparently.
Expensive- but give it time

note- there may be an issue running some motherboards outside the
case.. Voltage regulators.. (I think they are Little square things
near the CPU, surrounded by capacitors) They can get hot.

CPU Heatsinks  - with fans, suck air  in the top and out the sides.
Cooling them as well as the processor.
Passive CPU heatsinks won`t (or prob won`t?) cool them
But some motherboards are designed to passively cool. They have
passive heatsinks over them.

You can always move the computer out with a KVM Extender . And work on
silencing it...   While being so far from the box and past a closed
door or two, so you won`t hear it anyway.

But I think - Thank the big man upstairs - the days of trying to find
quieter and quieter components..are coming to an end. And may have
It looks like you can get all noiseless components now..  (hard drive
may be an issue still, since stateless are expensive. - there may be
some slower noiseless alternatives - booting off usb, and maybe flash
card) But there is alot of progress and price drops every few years)..

We had the speed revolutions in the 1990s. Now all computers are fast
enough for most people..   The revolutions now have been in noiseless
And also in types of networking related software like VNC, Synergy,

There are companies like quietpc, and forums like /

And alot of what I have written has been mentioned already on usenet ,
if you search usenet (google`s archive) for silent computer or perhaps
other related terms.

Regarding the fanless cases.
There were some watercooled ones , but they actually had a fan, so
gotta be careful with that. There was a refridgerated one, but a
retailer told me it "makes a noise like a fridge".  (as you know, some
fridges to make noise)
Zalman made a -very- expensive fanless case.  Things may have
improved.. Last time I looked was around 2003..

Furthermore, regarding the fanless cases.. There is a company that I
think do fanless computers with fanless cases..Even in 2003 and prob
prior to that.  Prior to fanless heatsinks and the silentmaxx PSU..
Then it was called   That website vanished and appeared. Looks like the same company.    I doubt
they would sell the case separately.. It looks liked a whole unit.. At
the time, was quite specialised.. cooled with heatsinks.

Re: Passively coole CPU

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I would change your expectations - if you have the latest CPU and a graphics
card and hard disk in the same case, then you are going to need airflow.

Even if you have no fans, the computer will still not be completely silent
as the hard disk spinning will still make a noise. Unless you go for a solid
state (expensive) drive and I think they are only up to 32GB at present.

However, fans don't have to mean noise. If you take a standard 120mm fan and
turn down the voltage it will run silently and still move (less) air around.
The loudest thing in my case are the hard disks spinning and they are
probably around 20db. I have 4 case fans and a PSU fan, but I have wired 3
of them to the 5v circuit instead of their usual 12v, so they run at less
than half speed and completely silently. The only fan I have on the 12v
circuit is a large 120mm fan over my Zalman CPU heatsink - I have that
controlled using a little black in-line resister box (forgotten the name)
that reduces the voltage so the fan is probably running somewhere between 7v
and 9v, but still silently. You could wire 2 12v fans in series to reduce
them both to 6v. Whatever you do, you will need airflow, so forget fanless,
unless you spend hundreds on a fanless case that has heatpipes all over the
place and a big radiator on one side.

Your other option is water cooling - the only noise will be the pump noise,
so if you concentrate your money on that part first, then you should get a
pretty quiet system, but it still won't be silent.

Re: Passively coole CPU

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No need - check out ebay item number 380007455498. 120mm fan, 8db and
40-60cfpm. Its finished now, but there are other similar fans out there.

Re: Passively coole CPU

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Clearly you don't want a fan on the chassis.  But If you did want one,
then sflex make some very quiet ones.
8db !!
So that may be the one GT saw on ebay.

makes are important.. remember sflex.. At the moment I think they are
the favourite.   They were suggested to me some time ago in email from
the guy. Do post any of his suggestions here. Or at least
on usenet, perhaps a junkier newsgroup like, so they are
at least archived!

They may be noiseless..
In the past , so-called quiet fans were a little less than 20db.  e.g.
18db ones by zalman.    So 8db is worth a look!
The easy way to have a fanless case may be to remove the side!
I reckon though if you monitor the temp, case temp, cpu temp e.t.c.
Can be done in windows with software like speedfan, and in the BIOS,
then you can make sure it is not getting too hot (except for voltage
regulators and perhaps some other things).
If doing that, then choose a motherboard that passively cools, then
your voltage regulators and potential other things (like northbridge
and southbridge I guess) will be kept cool.
If having the lid/side off the  case, it may be better if the
motherboard is flat.
Just speculation really regarding a fanless case. I haven't done it..

I once had a miniitx computer in a draw, and opened the draw when
using it. That was fine.

Actually.. I have left the side off a case , on a computer that has
lasted for years..

db isn't literally a measure of volume.. And only makes for a rough
guide to volume.

minor point regarding db
"Someone (or some people) interpreted test data and made a
generalization that a 10 dB [1 bel] change in level was twice (or
half) the volume and many texts compound this useless and deceiving
assertion. In practice the 6 dB change for full fidelity music
represents twice (or half) the volume better than the confusing 10 dB.
It has good scientific basis in that twice the pressure is an increase
in 6 dB.
The following is presented as factors supporting this: "

And this link

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