https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0

This might not be as good as a gigantic machined heat sink, but it's
easier.

The little guy will be an LM35 temperature sensor.

--

I yam what I yam - Popeye

On 3/18/2022 10:23 PM, jlarkin@highlandsniptechnology.com wrote:
>
> https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
>
> This might not be as good as a gigantic machined heat sink, but it's
> easier.
>
> The little guy will be an LM35 temperature sensor.
>
>
>
>
>

This is what the kids these days use to cool their gigantic GPUs, I
think the mad-scientist green gives it a certain pizazz:

<https://m.media-amazon.com/images/I/7154q7JKZVL._AC_SL1500_.jpg>

lørdag den 19. marts 2022 kl. 03.23.47 UTC+1 skrev jla...@highlandsniptechnology.com:
> https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
>
> This might not be as good as a gigantic machined heat sink, but it's
> easier.
>
> The little guy will be an LM35 temperature sensor.
>

if you look up the TPD for the CPU it is meant for you'd get an ideas of the likely performance

On Fri, 18 Mar 2022 22:28:36 -0400, bitrex <user@example.net> wrote:

>On 3/18/2022 10:23 PM, jlarkin@highlandsniptechnology.com wrote:
>>
>> https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
>>
>> This might not be as good as a gigantic machined heat sink, but it's
>> easier.
>>
>> The little guy will be an LM35 temperature sensor.
>>
>>
>>
>>
>>
>
>This is what the kids these days use to cool their gigantic GPUs, I
>think the mad-scientist green gives it a certain pizazz:
>
><https://m.media-amazon.com/images/I/7154q7JKZVL._AC_SL1500_.jpg>

Kool-aid kooler?

--

I yam what I yam - Popeye

On Fri, 18 Mar 2022 19:31:50 -0700 (PDT), Lasse Langwadt Christensen
<langwadt@fonz.dk> wrote:

>lørdag den 19. marts 2022 kl. 03.23.47 UTC+1 skrev jla...@highlandsniptechnology.com:
>> https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
>>
>> This might not be as good as a gigantic machined heat sink, but it's
>> easier.
>>
>> The little guy will be an LM35 temperature sensor.
>>
>
>if you look up the TPD for the CPU it is meant for you'd get an ideas of the likely performance
>

We can let this get pretty hot. 80 or even 100c maybe? We're going to
test one in a mockup chassis and measure the real theta. The CPU power
rating doesn't tell us a lot about theta.

--

I yam what I yam - Popeye

lørdag den 19. marts 2022 kl. 04.01.17 UTC+1 skrev jla...@highlandsniptechnology.com:
> On Fri, 18 Mar 2022 19:31:50 -0700 (PDT), Lasse Langwadt Christensen
> <lang...@fonz.dk> wrote:
>
> >lørdag den 19. marts 2022 kl. 03.23.47 UTC+1 skrev jla...@highlandsniptechnology.com:
> >> https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
> >>
> >> This might not be as good as a gigantic machined heat sink, but it's
> >> easier.
> >>
> >> The little guy will be an LM35 temperature sensor.
> >>
> >
> >if you look up the TPD for the CPU it is meant for you'd get an ideas of the likely performance
> >
> We can let this get pretty hot. 80 or even 100c maybe? We're going to
> test one in a mockup chassis and measure the real theta. The CPU power
> rating doesn't tell us a lot about theta.

sure, but CPU spec something like 50W TPD and Tj 100'C is a start

On a sunny day (Fri, 18 Mar 2022 19:23:37 -0700) it happened
jlarkin@highlandsniptechnology.com wrote in
<4afa3hlpivlfi9hq14dubtu9pstvpefk00@4ax.com>:

>
>https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
>
>This might not be as good as a gigantic machined heat sink, but it's
>easier.
>
>The little guy will be an LM35 temperature sensor.

Not sure about the air flow
Is there space between the fan and the surface?

PS was reading this yesterday:
https://www.tomshardware.com/news/modder-reduces-gddr6x-temps-with-copper-shim-cooling-mod

lørdag den 19. marts 2022 kl. 09.22.54 UTC+1 skrev Jan Panteltje:
> On a sunny day (Fri, 18 Mar 2022 19:23:37 -0700) it happened
> jla...@highlandsniptechnology.com wrote in
> <4afa3hlpivlfi9hq1...@4ax.com>:
> >
> >https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
> >
> >This might not be as good as a gigantic machined heat sink, but it's
> >easier.
> >
> >The little guy will be an LM35 temperature sensor.
> Not sure about the air flow
> Is there space between the fan and the surface?

airflow goes in through the sides of the heatsink between the fins, up through the fan and out the back

On a sunny day (Sat, 19 Mar 2022 04:27:44 -0700 (PDT)) it happened Lasse
Langwadt Christensen <langwadt@fonz.dk> wrote in
<c48b7b0c-3842-476c-bb6c-e3b0eb1467f0n@googlegroups.com>:

>l=C3=B8rdag den 19. marts 2022 kl. 09.22.54 UTC+1 skrev Jan Panteltje:
>> On a sunny day (Fri, 18 Mar 2022 19:23:37 -0700) it happened
>> jla...@highlandsniptechnology.com wrote in
>> <4afa3hlpivlfi9hq1...@4ax.com>:
>> >
>> >https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=3D0
>>
>>
>> >This might not be as good as a gigantic machined heat sink, but it's
>> >easier.
>> >
>> >The little guy will be an LM35 temperature sensor.
>> Not sure about the air flow
>> Is there space between the fan and the surface?
>
>airflow goes in through the sides of the heatsink between the fins, up through
>the fan and out the back

Thanks, got it

On Sat, 19 Mar 2022 04:27:44 -0700 (PDT), Lasse Langwadt Christensen
<langwadt@fonz.dk> wrote:

>lørdag den 19. marts 2022 kl. 09.22.54 UTC+1 skrev Jan Panteltje:
>> On a sunny day (Fri, 18 Mar 2022 19:23:37 -0700) it happened
>> jla...@highlandsniptechnology.com wrote in
>> <4afa3hlpivlfi9hq1...@4ax.com>:
>> >
>> >https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
>> >
>> >This might not be as good as a gigantic machined heat sink, but it's
>> >easier.
>> >
>> >The little guy will be an LM35 temperature sensor.
>> Not sure about the air flow
>> Is there space between the fan and the surface?
>
>airflow goes in through the sides of the heatsink between the fins, up through the fan and out the back

That particular cooler intakes on three sides and blows air out the
fourth. That's ideal for my use; the hot air will blow over the
Phoenix connector and out the back of the box.

https://www.dropbox.com/s/8ubv5if7cbnsjzn/P940-8_front.jpg?raw=1

Some coolers are designed to inhale their own hot air!

--

I yam what I yam - Popeye

On Saturday, March 19, 2022 at 7:27:48 AM UTC-4, lang...@fonz.dk wrote:
> lørdag den 19. marts 2022 kl. 09.22.54 UTC+1 skrev Jan Panteltje:
> > On a sunny day (Fri, 18 Mar 2022 19:23:37 -0700) it happened
> > jla...@highlandsniptechnology.com wrote in
> > <4afa3hlpivlfi9hq1...@4ax.com>:
> > >
> > >https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
> > >
> > >This might not be as good as a gigantic machined heat sink, but it's
> > >easier.
> > >
> > >The little guy will be an LM35 temperature sensor.
> > Not sure about the air flow
> > Is there space between the fan and the surface?
> airflow goes in through the sides of the heatsink between the fins, up through the fan and out the back

I suppose these fans have low pressure. I know the axial fans are that way..

--

Rick C.

- Get 1,000 miles of free Supercharging
- Tesla referral code - https://ts.la/richard11209

On Fri, 18 Mar 2022 20:01:06 -0700, jlarkin@highlandsniptechnology.com
wrote:

>On Fri, 18 Mar 2022 19:31:50 -0700 (PDT), Lasse Langwadt Christensen
><langwadt@fonz.dk> wrote:
>
>>lørdag den 19. marts 2022 kl. 03.23.47 UTC+1 skrev jla...@highlandsniptechnology.com:
>>> https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
>>>
>>> This might not be as good as a gigantic machined heat sink, but it's
>>> easier.
>>>
>>> The little guy will be an LM35 temperature sensor.
>>>
>>
>>if you look up the TPD for the CPU it is meant for you'd get an ideas of the likely performance
>>
>
>We can let this get pretty hot. 80 or even 100c maybe? We're going to
>test one in a mockup chassis and measure the real theta. The CPU power
>rating doesn't tell us a lot about theta.

That cooler measured 0.24 K/W. The transistors are huge so the
junctions won't get much above the heatsink temp.

I should be able to dump 200 watts.

--

If a man will begin with certainties, he shall end with doubts,
but if he will be content to begin with doubts he shall end in certainties.
Francis Bacon

lørdag den 19. marts 2022 kl. 17.41.48 UTC+1 skrev John Larkin:
> On Fri, 18 Mar 2022 20:01:06 -0700, jla...@highlandsniptechnology.com
> wrote:
> >On Fri, 18 Mar 2022 19:31:50 -0700 (PDT), Lasse Langwadt Christensen
> ><lang...@fonz.dk> wrote:
> >
> >>lørdag den 19. marts 2022 kl. 03.23.47 UTC+1 skrev jla...@highlandsniptechnology.com:
> >>> https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
> >>>
> >>> This might not be as good as a gigantic machined heat sink, but it's
> >>> easier.
> >>>
> >>> The little guy will be an LM35 temperature sensor.
> >>>
> >>
> >>if you look up the TPD for the CPU it is meant for you'd get an ideas of the likely performance
> >>
> >
> >We can let this get pretty hot. 80 or even 100c maybe? We're going to
> >test one in a mockup chassis and measure the real theta. The CPU power
> >rating doesn't tell us a lot about theta.
> That cooler measured 0.24 K/W. The transistors are huge so the
> junctions won't get much above the heatsink temp.

the datasheet for the transistor says typ. 0.24C/W case to sink
plus max 0.28C/W junction to case

On Fri, 18 Mar 2022 19:23:37 -0700, jlarkin@highlandsniptechnology.com
wrote:

>https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0

Use the center legs to conduct, but rotate bodies to allow tabs to
face the cooling surface.

RL

lørdag den 19. marts 2022 kl. 18.19.27 UTC+1 skrev legg:
> On Fri, 18 Mar 2022 19:23:37 -0700, jla...@highlandsniptechnology.com
> wrote:
>
> >https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
>
> Use the center legs to conduct, but rotate bodies to allow tabs to
> face the cooling surface.

the tabs are facing the cooling surface

On Sat, 19 Mar 2022 10:06:24 -0700 (PDT), Lasse Langwadt Christensen
<langwadt@fonz.dk> wrote:

>lørdag den 19. marts 2022 kl. 17.41.48 UTC+1 skrev John Larkin:
>> On Fri, 18 Mar 2022 20:01:06 -0700, jla...@highlandsniptechnology.com
>> wrote:
>> >On Fri, 18 Mar 2022 19:31:50 -0700 (PDT), Lasse Langwadt Christensen
>> ><lang...@fonz.dk> wrote:
>> >
>> >>lørdag den 19. marts 2022 kl. 03.23.47 UTC+1 skrev jla...@highlandsniptechnology.com:
>> >>> https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
>> >>>
>> >>> This might not be as good as a gigantic machined heat sink, but it's
>> >>> easier.
>> >>>
>> >>> The little guy will be an LM35 temperature sensor.
>> >>>
>> >>
>> >>if you look up the TPD for the CPU it is meant for you'd get an ideas of the likely performance
>> >>
>> >
>> >We can let this get pretty hot. 80 or even 100c maybe? We're going to
>> >test one in a mockup chassis and measure the real theta. The CPU power
>> >rating doesn't tell us a lot about theta.
>> That cooler measured 0.24 K/W. The transistors are huge so the
>> junctions won't get much above the heatsink temp.
>
>the datasheet for the transistor says typ. 0.24C/W case to sink
>plus max 0.28C/W junction to case

I'll be running two in parallel some times, all four some times. And
Tj max is 150C. Might work.

We'll run a realtime Tj simulation and shut down at computed 150C.

--

If a man will begin with certainties, he shall end with doubts,
but if he will be content to begin with doubts he shall end in certainties.
Francis Bacon

On Saturday, March 19, 2022 at 1:06:29 PM UTC-4, lang...@fonz.dk wrote:
> lørdag den 19. marts 2022 kl. 17.41.48 UTC+1 skrev John Larkin:
> > On Fri, 18 Mar 2022 20:01:06 -0700, jla...@highlandsniptechnology.com
> > wrote:
> > >On Fri, 18 Mar 2022 19:31:50 -0700 (PDT), Lasse Langwadt Christensen
> > ><lang...@fonz.dk> wrote:
> > >
> > >>lørdag den 19. marts 2022 kl. 03.23.47 UTC+1 skrev jla...@highlandsniptechnology.com:
> > >>> https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
> > >>>
> > >>> This might not be as good as a gigantic machined heat sink, but it's
> > >>> easier.
> > >>>
> > >>> The little guy will be an LM35 temperature sensor.
> > >>>
> > >>
> > >>if you look up the TPD for the CPU it is meant for you'd get an ideas of the likely performance
> > >>
> > >
> > >We can let this get pretty hot. 80 or even 100c maybe? We're going to
> > >test one in a mockup chassis and measure the real theta. The CPU power
> > >rating doesn't tell us a lot about theta.
> > That cooler measured 0.24 K/W. The transistors are huge so the
> > junctions won't get much above the heatsink temp.
> the datasheet for the transistor says typ. 0.24C/W case to sink
> plus max 0.28C/W junction to case

I'm sure it will be fine. It's not like he has to worry about the solder melting or anything. It's held together with screws.

What temperatures do CPU/GPU owners report when using similar cooling? I would not expect this one to be among the best. The fins are very short and the airflow is rather restricted. 200W is a lot even for a full blast CPU with overvoltage.

--

Rick C.

+- Get 1,000 miles of free Supercharging
+ Tesla referral code - https://ts.la/richard11209

On Saturday, March 19, 2022 at 1:19:27 PM UTC-4, legg wrote:
> On Fri, 18 Mar 2022 19:23:37 -0700, jla...@highlandsniptechnology.com
> wrote:
>
> >https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
>
> Use the center legs to conduct, but rotate bodies to allow tabs to
> face the cooling surface.

The transistors are on the bottom of the board, not sandwiched between the heat sink and the fan. The fins are very, very short on the top side of the heat sink, just under the fan which is moving air through the heat sink with a vacuum. Normally the fans blow into heat sinks, but in this case there's no room for that.

If this dissipates 200W per board and the chassis has say, 10 boards, that's going to be a metric shit ton of heat to get out of the case, and even the room. A space heater is around 1.5 kW. Put your hand in front of that!

--

Rick C.

-- Get 1,000 miles of free Supercharging
-- Tesla referral code - https://ts.la/richard11209

lørdag den 19. marts 2022 kl. 19.23.00 UTC+1 skrev Rickster:
> On Saturday, March 19, 2022 at 1:19:27 PM UTC-4, legg wrote:
> > On Fri, 18 Mar 2022 19:23:37 -0700, jla...@highlandsniptechnology.com
> > wrote:
> >
> > >https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
> >
> > Use the center legs to conduct, but rotate bodies to allow tabs to
> > face the cooling surface.
> The transistors are on the bottom of the board, not sandwiched between the heat sink and the fan. The fins are very, very short on the top side of the heat sink, just under the fan which is moving air through the heat sink with a vacuum. Normally the fans blow into heat sinks, but in this case there's no room for that.

it's rated for 125W TPD and CPU are usually 100'C max Tj

0.29 C/W with the fan at max speed

https://www.dynatron.co/product-page/k199

On Sat, 19 Mar 2022 10:35:10 -0700 (PDT), Lasse Langwadt Christensen
<langwadt@fonz.dk> wrote:

>lørdag den 19. marts 2022 kl. 18.19.27 UTC+1 skrev legg:
>> On Fri, 18 Mar 2022 19:23:37 -0700, jla...@highlandsniptechnology.com
>> wrote:
>>
>> >https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
>>
>> Use the center legs to conduct, but rotate bodies to allow tabs to
>> face the cooling surface.
>
>the tabs are facing the cooling surface
>
So the fan is just moving air around platic bodies and board surface?

RL

On Sat, 19 Mar 2022 10:35:10 -0700 (PDT), Lasse Langwadt Christensen
<langwadt@fonz.dk> wrote:

>lørdag den 19. marts 2022 kl. 18.19.27 UTC+1 skrev legg:
>> On Fri, 18 Mar 2022 19:23:37 -0700, jla...@highlandsniptechnology.com
>> wrote:
>>
>> >https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
>>
>> Use the center legs to conduct, but rotate bodies to allow tabs to
>> face the cooling surface.
>
>the tabs are facing the cooling surface
>
The cooling surface is attached to the fan fins. The tabs should face
the cooling surface - not as illustrated in mock4.

RL

lørdag den 19. marts 2022 kl. 20.09.24 UTC+1 skrev legg:
> On Sat, 19 Mar 2022 10:35:10 -0700 (PDT), Lasse Langwadt Christensen
> <lang...@fonz.dk> wrote:
> >lørdag den 19. marts 2022 kl. 18.19.27 UTC+1 skrev legg:
> >> On Fri, 18 Mar 2022 19:23:37 -0700, jla...@highlandsniptechnology.com
> >> wrote:
> >>
> >> >https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
> >>
> >> Use the center legs to conduct, but rotate bodies to allow tabs to
> >> face the cooling surface.
> >
> >the tabs are facing the cooling surface
> >
> The cooling surface is attached to the fan fins. The tabs should face
> the cooling surface - not as illustrated in mock4.

the tabs are facing the cooling surface, mock4 is a bottom view,
shows the transistors mounted through a hole in the PCB

lørdag den 19. marts 2022 kl. 20.04.20 UTC+1 skrev legg:
> On Sat, 19 Mar 2022 10:35:10 -0700 (PDT), Lasse Langwadt Christensen
> <lang...@fonz.dk> wrote:
>
> >lørdag den 19. marts 2022 kl. 18.19.27 UTC+1 skrev legg:
> >> On Fri, 18 Mar 2022 19:23:37 -0700, jla...@highlandsniptechnology.com
> >> wrote:
> >>
> >> >https://www.dropbox.com/sh/xq91kwztbqfwn72/AACBtWvHaB1JBDfkTsF4wGmCa?dl=0
> >>
> >> Use the center legs to conduct, but rotate bodies to allow tabs to
> >> face the cooling surface.
> >
> >the tabs are facing the cooling surface
> >
> So the fan is just moving air around platic bodies and board surface?

no

On Saturday, March 19, 2022 at 6:30:23 AM UTC-7, jla...@highlandsniptechnology.com wrote:

> That particular cooler intakes on three sides and blows air out the
> fourth. That's ideal for my use; the hot air will blow over the
> Phoenix connector and out the back of the box.

It's not completely ideal; the airflow favors cooling the side opposite the
outlet. A ribbed plate with air flowing parallel to the ribs would ensure
some heatflow uniformity regardless of lateral conduction in the plate.

For serious cooling, your fan can be one-per-box, and air channeled not by
objects clamped to the printed wiring board, but by vanes riveted to the box.
The tiny internal fan, even though it may be effective, is not as easy to inspect
or replace as a muffin fan mounted to the box/chassis. Moving parts,
substantial failure possibilities...