Passively cooled athlon x2 3800 ?

[Skybuck Flying]

Hello,

Anybody running an athlon x2 3800 with passive cooling ?

Preferably a large heatsink only no leaky water stuff ?

Just wondering if that's possible...

Bye,
Skybuck.

 

[Michael Hawes]

Hello,

Anybody running an athlon x2 3800 with passive cooling ?

Preferably a large heatsink only no leaky water stuff ?

Just wondering if that's possible...

Bye,
Skybuck.

Try
http://www.bigbruin.com/reviews05/review.php?item=thermalrighthr01&file=1

Mike.

 

[Skybuck]

Try
http://www.bigbruin.com/reviews05/review.php?item=thermalrighthr01&file=1

Hmm, reading it right now... looking at the picture... it makes me
wonder why they don't paint it black or something.

Black obsorbes the heat/radiation from the processor much better than
reflective stuff/material.

Oh well.

Bye,
Skybuck.

 

[JAD]

http://www.bigbruin.com/reviews05/review.php?item=thermalrighthr01&file=1

Hmm, reading it right now... looking at the picture... it makes me
wonder why they don't paint it black or something.

Black obsorbes the heat/radiation from the processor much better than
reflective stuff/material.

Wrong as usual.......... its about DISSIPATING heat not absorbing it

 

[spodosaurus]

Wrong as usual.......... its about DISSIPATING heat not absorbing it

Give the kid a break, he's off his medication

 

[David Maynard]

Hmm, reading it right now... looking at the picture... it makes me
wonder why they don't paint it black or something.

Black obsorbes the heat/radiation from the processor much better than
reflective stuff/material.

Well, there's multiple reasons but the most basic one is that the primary
heat transfer mechanism from CPU to heatsink is by thermal conduction and
not radiation.

 

[Skybuck]

Wrong as usual.......... its about DISSIPATING heat not absorbing it

Nope you wrong as usual.

The cooler has to absorb the heat from the cpu and then transfer and
release it again

Bye,
Bye,
Skybuck =D

 

[spodosaurus]

Nope you wrong as usual.

The cooler has to absorb the heat from the cpu and then transfer and
release it again

Bye,
Bye,
Skybuck =D

Colour in this case has nothing to do with it, and painting it will
create another interface thus partially insulating the heat sink.
Seriously, you really do need the lithium.

--
spammage trappage: remove the underscores to reply

I'm going to die rather sooner than I'd like. I tried to protect my
neighbours from crime, and became the victim of it. Complications in
hospital following this resulted in a serious illness. I now need a bone
marrow transplant. Many people around the world are waiting for a marrow
transplant, too. Please volunteer to be a marrow donor:
http://www.abmdr.org.au/
http://www.marrow.org/

 

[Sean Cousins]

Colour in this case has nothing to do with it, and painting it will
create another interface thus partially insulating the heat sink.
Seriously, you really do need the lithium.

http://www.globalwinusa.com/faqs/heatsink/color.html
Does heatsink color affect heat dissipation?

Black is the best thermal body in terms of being a absorber or
emitter. Let's assume a vacuum situation, if the surface "A" of a
black heatsink is totally covered at T1 (temperature 1) by another
black body at T2 (temperature 2), the black heatsink would get the
energy reflected from another black body at reflection energy
Ad(T14-T24) that we call "Stefan-Boltzmann" law of thermal radiation,
here refers to Stefan Boltzmann Constant, it is 5.6697 x 10-8 w/m2?K4.
Therefore if based on above, T1 is the temperature obtained from the
black heatsink onto CPU, T2 is the ambient temperature around CPU. So
if T14-T24 is a positive value, we know black is the best heat
dissipation transistor since there is no thermal source around CPU
inside PC case.

 

[spodosaurus]

http://www.globalwinusa.com/faqs/heatsink/color.html
Does heatsink color affect heat dissipation?

Black is the best thermal body in terms of being a absorber or
emitter. Let's assume a vacuum situation, if the surface "A" of a
black heatsink is totally covered at T1 (temperature 1) by another
black body at T2 (temperature 2), the black heatsink would get the
energy reflected from another black body at reflection energy
Ad(T14-T24) that we call "Stefan-Boltzmann" law of thermal radiation,
here refers to Stefan Boltzmann Constant, it is 5.6697 x 10-8 w/m2?K4.
Therefore if based on above, T1 is the temperature obtained from the
black heatsink onto CPU, T2 is the ambient temperature around CPU. So
if T14-T24 is a positive value, we know black is the best heat
dissipation transistor since there is no thermal source around CPU
inside PC case.

Cutting and pasting is all well and good, but you wouldn't need to if
you understood what it means. And that last sentence is complete crap,
as you'd know if you ever opened a PC case with anything more than the
cheapest of graphics cards. The above sounds good until you try and plug
in numbers and then...oopsy...it's gibberish. Also, globalwin are pretty
gimicky and do not make the greatest HSF units. They're part of the
reason Athlons got a reputation for being loud.

--
spammage trappage: remove the underscores to reply

I'm going to die rather sooner than I'd like. I tried to protect my
neighbours from crime, and became the victim of it. Complications in
hospital following this resulted in a serious illness. I now need a bone
marrow transplant. Many people around the world are waiting for a marrow
transplant, too. Please volunteer to be a marrow donor:
http://www.abmdr.org.au/
http://www.marrow.org/

 

[David Maynard]

http://www.globalwinusa.com/faqs/heatsink/color.html
Does heatsink color affect heat dissipation?

Black is the best thermal body in terms of being a absorber or
emitter. Let's assume a vacuum situation, if the surface "A" of a
black heatsink is totally covered at T1 (temperature 1) by another
black body at T2 (temperature 2), the black heatsink would get the
energy reflected from another black body at reflection energy
Ad(T14-T24) that we call "Stefan-Boltzmann" law of thermal radiation,
here refers to Stefan Boltzmann Constant, it is 5.6697 x 10-8 w/m2?K4.
Therefore if based on above, T1 is the temperature obtained from the
black heatsink onto CPU, T2 is the ambient temperature around CPU. So
if T14-T24 is a positive value, we know black is the best heat
dissipation transistor since there is no thermal source around CPU
inside PC case.

Well, globalwin apparently doesn't know what the heck they're talking about
because it's a "black body" that's a good absorber/radiator, not that it's
painted the color black.

Visible light, which makes 'color', is only a tiny fraction of the EM
spectrum and unless you're planning to heat the thing up to 900 kelvins, or
so, the visible spectrum ain't even in play.

Not to mention that a layer of paint would act as a thermal barrier.

 

[Sean Cousins]

Cutting and pasting is all well and good, but you wouldn't need to if
you understood what it means. And that last sentence is complete crap,
as you'd know if you ever opened a PC case with anything more than the
cheapest of graphics cards. The above sounds good until you try and plug
in numbers and then...oopsy...it's gibberish. Also, globalwin are pretty
gimicky and do not make the greatest HSF units. They're part of the
reason Athlons got a reputation for being loud.

The cut 'n' paste offers more insight than your "opinion". There have
been a few heatsink companies that have used black. I suppose you
think it was just to look cool?

 

[Sean Cousins]

Not to mention that a layer of paint would act as a thermal barrier.

It has to be anodized on not painted on. Here's a clueless test where
they painted a heatsink black.
http://www.a1-electronics.net/Heatsinks/2004/MattBlack_Feb.shtml

Black cars get hotter inside than a white car when being baked in the
sun. Guess why? I'm not saying using black is going to make a real
difference but it does have a small effect.

 

[spodosaurus]

The cut 'n' paste offers more insight than your "opinion". There have
been a few heatsink companies that have used black. I suppose you
think it was just to look cool?

The cut and paste is jibberish with nothing useful at all much less
anything applicable to the situation. Finish high school (AP classes,
not the 'I wanna be a burger flipper' classes) and you'll actually use
the formulas that would help you understand what's really going on.
Until then you'll continue to fall for pseudo science made to sound like
it's saying something definitive but which is actually just garbage.

--
spammage trappage: remove the underscores to reply

I'm going to die rather sooner than I'd like. I tried to protect my
neighbours from crime, and became the victim of it. Complications in
hospital following this resulted in a serious illness. I now need a bone
marrow transplant. Many people around the world are waiting for a marrow
transplant, too. Please volunteer to be a marrow donor:
http://www.abmdr.org.au/
http://www.marrow.org/

 

[David Maynard]

It has to be anodized on not painted on.

The original poster said "makes me wonder why they don't paint it black" so
that's what I was dealing with.

Here's a clueless test where
they painted a heatsink black.
http://www.a1-electronics.net/Heatsinks/2004/MattBlack_Feb.shtml

Black cars get hotter inside than a white car when being baked in the
sun. Guess why?

You might have noticed that the sun emits a fair amount of visible light.

I'm not saying using black is going to make a real
difference but it does have a small effect.

Black anodizing would be about a 3% improvement for natural convection
heatsinks and negligible with forced convection.