How it\\\'s made: heat sinks...

On Sun, 15 May 2022 20:03:34 +0100, Ricky <gnuarm.deletethisbit@gmail.com> wrote:

On Sunday, May 15, 2022 at 3:00:54 PM UTC-4, Ricky wrote:
On Thursday, April 21, 2022 at 12:29:27 AM UTC-4, Don wrote:
Lasse Langwadt Christensen <lang...@fonz.dk> wrote:
onsdag den 20. april 2022 kl. 23.29.25 UTC+2 skrev Ricky:
On Wednesday, April 20, 2022 at 3:09:35 PM UTC-4, Don wrote:
Commander Kinsey wrote:

snip
Since you know so much about them, why does mine have some copper fins
and some aluminium? Surely either one or the other is better? Or is
it just to make it look pretty?
Good question. For decades now, Intel retailed bi-metallic CPU coolers
with copper baseplates and aluminum fins:

https://crcomp.net/misc/heatsink/bottom.png
https://crcomp.net/misc/heatsink/top.png

The coolers shown above are intended for use in a \"beige box.\" The
cooler fan on top of the copper core and the CPU beneath it obscure all
aesthetic aspects.
Perhaps the copper provides superior thermal conductivity while the
aluminum offers greater mechanical strength?
I don\'t think copper is not strong enough for a heat sink, but it\'s
freaking heavy compared to aluminum. You can only bolt so much weight
onto these boards before it causes problems. The copper base is great
for spreading the heat out to the fins, but the fins don\'t need to be
so highly conductive to carry their portion of the heat and couple it
to the air.

https://youtu.be/Q7qVpWu2QYs

but as you say, once the heat has been spread over a larger area there
is probably not much benefit from expensive copper

Here\'s a solid copper server cooler shown next to a light-weight desktop
bi-metallic:

https://crcomp.net/misc/heatsink/serverdesktop.png

The copper cooler weighs 989 g versus 256 g for the bi-metallic. The
metal standoffs of the heavier cooler are designed to pass through over-
sized motherboard holes and bolt directly to a server chassis. The
lighter aluminum cooler uses plastic standoffs to secure itself directly
to a desktop motherboard instead.
Both copper and aluminum fins feel firm to the touch.
I often get crosstalk from other threads when I try to post. I\'m curious as to which thread the post will actually land in.

Interesting, this post was made while viewing the Tesla is Fast thread.
Click to expand...

Are you drunk?
 
On Sunday, May 15, 2022 at 3:00:54 PM UTC-4, Ricky wrote:
On Thursday, April 21, 2022 at 12:29:27 AM UTC-4, Don wrote:
Lasse Langwadt Christensen <lang...@fonz.dk> wrote:
onsdag den 20. april 2022 kl. 23.29.25 UTC+2 skrev Ricky:
On Wednesday, April 20, 2022 at 3:09:35 PM UTC-4, Don wrote:
Commander Kinsey wrote:

snip
Since you know so much about them, why does mine have some copper fins
and some aluminium? Surely either one or the other is better? Or is
it just to make it look pretty?
Good question. For decades now, Intel retailed bi-metallic CPU coolers
with copper baseplates and aluminum fins:

https://crcomp.net/misc/heatsink/bottom.png
https://crcomp.net/misc/heatsink/top.png

The coolers shown above are intended for use in a \"beige box.\" The
cooler fan on top of the copper core and the CPU beneath it obscure all
aesthetic aspects.
Perhaps the copper provides superior thermal conductivity while the
aluminum offers greater mechanical strength?
I don\'t think copper is not strong enough for a heat sink, but it\'s
freaking heavy compared to aluminum. You can only bolt so much weight
onto these boards before it causes problems. The copper base is great
for spreading the heat out to the fins, but the fins don\'t need to be
so highly conductive to carry their portion of the heat and couple it
to the air.

https://youtu.be/Q7qVpWu2QYs

but as you say, once the heat has been spread over a larger area there
is probably not much benefit from expensive copper

Here\'s a solid copper server cooler shown next to a light-weight desktop
bi-metallic:

https://crcomp.net/misc/heatsink/serverdesktop.png

The copper cooler weighs 989 g versus 256 g for the bi-metallic. The
metal standoffs of the heavier cooler are designed to pass through over-
sized motherboard holes and bolt directly to a server chassis. The
lighter aluminum cooler uses plastic standoffs to secure itself directly
to a desktop motherboard instead.
Both copper and aluminum fins feel firm to the touch.
I often get crosstalk from other threads when I try to post. I\'m curious as to which thread the post will actually land in.
Click to expand...

Interesting, this post was made while viewing the Tesla is Fast thread.
 
On Friday, September 22, 2017 at 8:13:45 AM UTC-4, Foxs Mercantile wrote:
On 9/22/2017 2:16 AM, rickman wrote:
Might have run off the air compressor which remains pressurized for
some time after a power failure. It\'s hard to imagine such a small
change in volume producing enough work to ring a bell.
In the 4 stations I worked at as a gopher in the late \'60s, NONE of
them had electric bells.

And NO, the hose wasn\'t full of air. It was full of oil.

The striker would hit the bell going up when someone rolled over the
hose, and again on the way down when they rolled off the hose.

Hence the da-ding every time.




--
Jeff-1.0
wa6fwi
http://www.foxsmercantile.com
Click to expand...
 
El lunes, 16 de mayo de 2022 a las 9:18:13 UTC+2, Commander Kinsey escribió:
On Sun, 15 May 2022 20:03:34 +0100, Ricky <gnuarm.del...@gmail.com> wrote:

On Sunday, May 15, 2022 at 3:00:54 PM UTC-4, Ricky wrote:
On Thursday, April 21, 2022 at 12:29:27 AM UTC-4, Don wrote:
Lasse Langwadt Christensen <lang...@fonz.dk> wrote:
onsdag den 20. april 2022 kl. 23.29.25 UTC+2 skrev Ricky:
On Wednesday, April 20, 2022 at 3:09:35 PM UTC-4, Don wrote:
Commander Kinsey wrote:

snip
Since you know so much about them, why does mine have some copper fins
and some aluminium? Surely either one or the other is better? Or is
it just to make it look pretty?
Good question. For decades now, Intel retailed bi-metallic CPU coolers
with copper baseplates and aluminum fins:

https://crcomp.net/misc/heatsink/bottom.png
https://crcomp.net/misc/heatsink/top.png

The coolers shown above are intended for use in a \"beige box.\" The
cooler fan on top of the copper core and the CPU beneath it obscure all
aesthetic aspects.
Perhaps the copper provides superior thermal conductivity while the
aluminum offers greater mechanical strength?
I don\'t think copper is not strong enough for a heat sink, but it\'s
freaking heavy compared to aluminum. You can only bolt so much weight
onto these boards before it causes problems. The copper base is great
for spreading the heat out to the fins, but the fins don\'t need to be
so highly conductive to carry their portion of the heat and couple it
to the air.

https://youtu.be/Q7qVpWu2QYs

but as you say, once the heat has been spread over a larger area there
is probably not much benefit from expensive copper

Here\'s a solid copper server cooler shown next to a light-weight desktop
bi-metallic:

https://crcomp.net/misc/heatsink/serverdesktop.png

The copper cooler weighs 989 g versus 256 g for the bi-metallic. The
metal standoffs of the heavier cooler are designed to pass through over-
sized motherboard holes and bolt directly to a server chassis. The
lighter aluminum cooler uses plastic standoffs to secure itself directly
to a desktop motherboard instead.
Both copper and aluminum fins feel firm to the touch.
I often get crosstalk from other threads when I try to post. I\'m curious as to which thread the post will actually land in.

Interesting, this post was made while viewing the Tesla is Fast thread.
Are you drunk?
Click to expand...
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