Which is better, heat pipe or heat sinks/fan CPU cooling solution. ?

[Ed Light]

I got an Arctic Freezer 64 lightweight heat-piper, $35, marvelled at the
rough base, tried to lap it, had to leave it convex, removed the fan,
mounted the Freezer up on Arctic Alumina, made a duct from it to the case
fan with aluminum tape, case fan is high-speed Panaflo 80mm on a Zalman fan
mate, running at 2300 rpm, pretty quiet, keeps the Winchester cool, keeps
much of the cpu heat away from the system. It eats the heat from the video
card -- but they don't make one of the Arctic blow it out the back models
for the AGP 6600GT.

Anyhow, I do recommend the blow-it-out-the-back configuration.

The advantage with heat-pipers that stick up instead of widely out is they
fit in ok. Also the fan, if your socket is oriented right, blows towards the
back to the case fan. If not it blows right into the psu. But you can do
that on a normal heatsink by reversing the fan, which works well, quite
often. Then you're not blasting hot air on the memory and what-not. On the
other hand, you're not forcibly ventilating them.

Ahh ...

I may put a slow-speed 80mm fan in the nose of the case to help ventilate
the chipset and video card, but not up against the intake. Having one
mounted there sucks in masses of dust.

I don't think things are getting very hot, though, with the cpu in the
20'sC, and reaching 41C on p95 only if it's warm inside.
--
Ed Light

Smiley :-/
MS Smiley :-\

Send spam to the FTC at
(e-mail address removed)
Thanks, robots.

 

[Ed Light]

I don't think things are getting very hot, though, with the cpu in the
20'sC, and reaching 41C on p95 only if it's warm inside.

That's an o/c'd Winchester 3200+ to 3800+, and overvolted .1v, with
Cool'N'Quiet.

 

[Mxsmanic]

the xp 120/90 kind of work like a condenser in a refrigeration or a/c
system. The base plate "boils" the coolant in and it transfers the heat to
the fins (condenser) where it is cooled and returns to a "liquid" state.

All heat pipes work in essentially this way. They usually have to be
custom-designed and optimized for a specific environment, but once this
is done they can move a staggering amount of heat, compared to more
passive methods.

 

[TonyC]

I'm looking to purchase a heat sink and fan for the AMD Athlon 64 3500+
(Winchester) core.socket 939. There are new heat pipe technology heat
sinks out there these days and I need to know If heat pipe technology is
superior to the standard copper or aluminum heat sink/fans that I have
been using for years. and what brand and model would recommend for
either technology. Please give me you opinions on this matter.

Using Akasa AK913 Evo33 on my 3200+ Venice (@2.7Ghz), idles about 30c, max
38c under stress testing (Prime95 etc). I'm well chuffed with it. Looks
cool too.


Tony.

 

[sbb78247]

All heat pipes work in essentially this way. They usually have to be
custom-designed and optimized for a specific environment, but once
this is done they can move a staggering amount of heat, compared to
more passive methods.

The xp120 got some of the "mad scientists" in our shop thinking about a more
economical way to cool with refrigeration than what is currently out there.

 

[Le Rosbif]

The xp120 got some of the "mad scientists" in our shop thinking about a more
economical way to cool with refrigeration than what is currently out there.

Whilst avoiding condensing water from the atmosphere.......

 

[Forum User]

Heatpipes use (refrigerant) convection, not refrigeration (which has a
compression phase in the cycle).

 

[keith]

Heatpipes use (refrigerant) convection, not refrigeration (which has a
compression phase in the cycle).

Well, heat-pipes do use *passive* refrigeration. The same phase changes
go on. The process is simply "pumped" by the spare heat of the
processor. This is "refrigeration", as much as a gas "fired" refrigerator
is a "refrigerator". ...actually more so, because the refrigerator isn't
using "waste" heat.

 

[David Maynard]

Well, heat-pipes do use *passive* refrigeration.

There's no such thing as it violates the laws of thermodynamics.

The same phase changes
go on. The process is simply "pumped" by the spare heat of the
processor.

You missed the key point, the compression-expansion cycle.

This is "refrigeration", as much as a gas "fired" refrigerator
is a "refrigerator". ...actually more so, because the refrigerator isn't
using "waste" heat.

No.

A 'refrigeration' device drives the temperature below anything around it,
including the dissipation medium, and, so, requires power input to do the
work of pumping heat contrary to the natural flow.

A gas fired refrigerator accomplishes that by using the gas heat to drive
the compression cycle and without that it would be no more than a 'heat
pipe' (assuming it was modified to function well as a heat pipe) unable to
cool below ambient.

Which is why you'll never see any 'heat pipe refrigerators' nor any 'heat
pipe beer coolers'. You could accomplish the same results by simply leaving
things out of the box because ambient is the best you could get inside the
box with a 'heat pipe cooler'.

 

[Forum User]

Well, heat-pipes do use *passive* refrigeration. The same phase
changes go on.

You need to look up 'refrigeration'.
Refrigerators are heat-pumps, able to transfer heat AGAINST thermal
gradients - allowing sub-ambient cooling.
The key phase is compression.
No compression, no refrigeration.
You could fill a heatpipe with anything - and it's still just a
coolant-convection device.
Filling it with a 'refrigerant' won't make it a refrigerator.


The process is simply "pumped" by the spare heat of the

 

[David Maynard]

You need to look up 'refrigeration'.
Refrigerators are heat-pumps, able to transfer heat AGAINST thermal
gradients - allowing sub-ambient cooling.
The key phase is compression.
No compression, no refrigeration.

Well, not with gas/liquids as the working medium anyway, which is probably
what you meant. But peltier devices operate on a completely different
principle with no compression cycle involved.

 

[Forum User]

Well, not with gas/liquids as the working medium anyway, which is
probably what you meant. But peltier devices operate on a completely
different principle with no compression cycle involved.

Peltiers are not refrigerators because there's no refrigerant to be
phase-changed.
Not quite sure why you raised the subject of Peltiers.

 

[Kadaitcha Man]

Forum User, <[email protected]>, the disorganised, milky gossiper, and
sheep and goat skinner, boohooed:

Peltiers are not refrigerators

The International Institute of Refrigeration disagrees with you.

http://www.iifiir.org/

 

[Mxsmanic]

Peltiers are not refrigerators because there's no refrigerant to be
phase-changed.

A refrigerator is anything that refrigerates, with or without
refrigerant. Thus, Peltier devices are refrigerators, even though they
contain no conventional refrigerant (although I suppose one could
consider electrons to be the refrigerant).

 

[Mxsmanic]

They refrigerate - but in that they are not phase-change heat-pumps, they
are not what are normally referred to as refrigerators.

By whom? I've usually heard them called refrigerators.

 

[Kadaitcha Man]

Mxsmanic, <[email protected]>, the grizzled, obese imbecile, and street
entertainer who sings ballads, bitched:

Transpose hotmail and mxsmanic in my e-mail address

Hmmmm....

(e-mail address removed)

Organization:
Anthony Atkielski
29 rue du General Bertrand
Paris, 75007
FR

Anthony Atkielski
Boite Postale 428-07
Paris Cedex 07, 75327
FR

Phone: +33145671282
Fax..: +33145676838
Email: (e-mail address removed)

Is that you?

 

[Forum User]

A refrigerator is anything that refrigerates, with or without
refrigerant. Thus, Peltier devices are refrigerators, even though
they contain no conventional refrigerant (although I suppose one could
consider electrons to be the refrigerant).

So you use a Peltier to refrigerate your beer, do you ?
The whole point was that HEATPIPES aren't refrigerators.
So why are Pelts being discussed ?

 

[Forum User]

By whom? I've usually heard them called refrigerators.

Funny, but I can't remember the last time I heard someone say "I'm just
gunna get a beer out of the Peltier".
Strange that.

 

[David Maynard]

Peltiers are not refrigerators because there's no refrigerant to be
phase-changed.

You have the refrigerator and refrigerant dependencies reversed.
Refrigerant is dependent on refrigeration as it is the functional name of
the active medium used for that purpose but refrigerator is not dependent
on refrigerant. As you so aptly put it "Refrigerators are heat-pumps, able
to transfer heat AGAINST thermal gradients - allowing sub-ambient cooling."

And that perfectly describes peltiers.

Not quite sure why you raised the subject of Peltiers.

For completeness since you also said "No compression, no refrigeration."

 

[David Maynard]

Funny, but I can't remember the last time I heard someone say "I'm just
gunna get a beer out of the Peltier".
Strange that.

Maybe because you just don't happen to know anyone who owns this peltier
based refrigerator, or one like it.

http://www.beveragefactory.com/refrigerators/compact/ec15w.shtml