Groups > alt.comp.os.windows-10 > #118314

Re: Has anybody ever stacked two CPU coolers?

From	Rene Lamontagne <rlamont@shaw.ca>
Newsgroups	alt.comp.os.windows-10, alt.computer.workshop
Subject	Re: Has anybody ever stacked two CPU coolers?
Date	2020-07-25 19:43 -0500
Message-ID	<ho41ttF7ocpU1@mid.individual.net> (permalink)
References	<op.0oboc2f2wdg98l@glass> <rfic0j$78q$1@dont-email.me>

Cross-posted to 2 groups.

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On 2020-07-25 5:33 p.m., Paul wrote:
> Commander Kinsey wrote:
>> Has anybody ever stacked two CPU coolers? First one fitted normally, 
>> then the second welded on top of it. Theoretically, you have twice the 
>> cooling, if it conducts through the first fast enough. I'm referring 
>> to the type with the fan on the side.
> 
> Call me, when your solution uses heatpipes.
> 
> Look at the Zalman completely-passive cooling
> computer case, if you want to see how to do it.
> It moves heat from one place to another with
> heatpipes. The exterior of the case is the
> final destination.
> 
> https://www.quietpc.com/tnn500af
> 
> Only with heatpipes, can you move heat from
> the origin, to the second heatsink, and expect
> to get improved performance.
> 
> That's why heatpipes are used, between baseplate
> and top-of-fins, so that an excessively-long fin
> does some work for you.
> 
> It's also why a 50mm tall 40mm square heatsink,
> is no more effective than a 25mm tall 40mm square heatsink.
> Those are used on chipsets. The upper portion of the
> taller unit, has insufficient thermal conduction
> for the top of the fins to remove heat. It means
> making fins longer and longer (without heatpipes),
> is asymptotic. At some point, a longer fin adds
> nothing to the solution.
> 
> Once you lace the parts together with heatpipes,
> then we'll talk. There's a limit to how many
> heatpipes can be fitted, and some thought has to be
> put into where the heatpipe is moving the heat.
> 
> You place the heatpipe at the source, as only if
> the heatpipe is in intimate contact, does its 1000x
> better performance, work. Just ramming a pipe into
> a block with 3 inches of aluminum between the
> baseplate and the pipe, that would be useless too.
> As the 3 inches of aluminum is a huge thermal
> resistance, and the zero resistance of the heatpipe
> on top cannot then help. The heatpipes always start
> in the baseplate, touching the CPU.
> 
> This is why we buy a larger heatsink, like a Noctua.
> Instead of impishly welding stuff together, the
> heatpipes on the properly-designed unit, have been
> selected for the perfect location to get the
> best effect. While the unit may be designed with
> two fans, it works quite well with only the
> central fan fitted.
> 
> Heatpipes have non-linear behavior. If you pump too
> much heat into them, the liquid-vapor phase transfer
> stops because all the materials remain in the vapor
> phase. The manufacturer will usually suggest a max
> power as a practical limit (before the pipes saturate
> and the degree-of-cooling ends up actually reduced).
> If you put six pipes in parallel, as soon as one
> pipe saturates, the other five carry the load and
> then they drop in quick succession.
> 
>     Paul

That case sure has a lot of good engineering put into it, I can see why 
it has casters, it weighs  about 70  lbs, I looked around a bit but 
couldn't find a price on it yet.
It will be great for audio  and such purposes.

I'm not in need of one because one of the perks of old age is a much 
reduced sound perception (what did you say).  :-)

Rene

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Has anybody ever stacked two CPU coolers? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-25 19:01 +0100
  Re: Has anybody ever stacked two CPU coolers? Wolffan <akwolffan@zoho.com> - 2020-07-25 16:52 -0400
    Re: Has anybody ever stacked two CPU coolers? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-25 22:37 +0100
      Re: Has anybody ever stacked two CPU coolers? Wolffan <akwolffan@zoho.com> - 2020-07-25 18:01 -0400
        Re: Has anybody ever stacked two CPU coolers? David_B <DavidB@nomail.afraid.org> - 2020-07-25 23:08 +0100
          Re: Has anybody ever stacked two CPU coolers? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-26 00:31 +0100
            Re: Has anybody ever stacked two CPU coolers? Wolffan <akwolffan@zoho.com> - 2020-07-25 19:41 -0400
              Re: Has anybody ever stacked two CPU coolers? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-26 15:25 +0100
                Re: Has anybody ever stacked two CPU coolers? Wolffan <akwolffan@zoho.com> - 2020-07-26 10:40 -0400
                Re: Has anybody ever stacked two CPU coolers? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-26 15:43 +0100
                Re: Has anybody ever stacked two CPU coolers? Wolffan <akwolffan@zoho.com> - 2020-07-26 11:38 -0400
                Re: Has anybody ever stacked two CPU coolers? David_B <DavidB@nomail.afraid.org> - 2020-07-26 17:32 +0100
                Re: Has anybody ever stacked two CPU coolers? Wolffan <akwolffan@zoho.com> - 2020-07-26 16:13 -0400
                Re: Has anybody ever stacked two CPU coolers? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-26 22:18 +0100
                Re: Has anybody ever stacked two CPU coolers? Wolffan <akwolffan@zoho.com> - 2020-07-26 19:21 -0400
                Re: Has anybody ever stacked two CPU coolers? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-26 18:06 +0100
                Re: Has anybody ever stacked two CPU coolers? Wolffan <akwolffan@zoho.com> - 2020-07-26 16:14 -0400
                Re: Has anybody ever stacked two CPU coolers? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-26 22:17 +0100
                Re: Has anybody ever stacked two CPU coolers? Wolffan <akwolffan@zoho.com> - 2020-07-26 19:26 -0400
          Re: Has anybody ever stacked two CPU coolers? Wolffan <akwolffan@zoho.com> - 2020-07-25 19:32 -0400
        Re: Has anybody ever stacked two CPU coolers? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-26 15:20 +0100
          Re: Has anybody ever stacked two CPU coolers? "Carlos E.R." <robin_listas@es.invalid> - 2020-07-27 11:32 +0200
            Re: Has anybody ever stacked two CPU coolers? Rene Lamontagne <rlamont@shaw.ca> - 2020-07-27 08:59 -0500
              Re: Has anybody ever stacked two CPU coolers? "Carlos E.R." <robin_listas@es.invalid> - 2020-07-27 22:59 +0200
      Re: Has anybody ever stacked two CPU coolers? Avila Kap <kap0utox01@jamaica.com> - 2020-07-25 16:52 -0700
        Re: Has anybody ever stacked two CPU coolers? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-26 15:38 +0100
  Re: Has anybody ever stacked two CPU coolers? Paul <nospam@needed.invalid> - 2020-07-25 18:33 -0400
    Re: Has anybody ever stacked two CPU coolers? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-25 23:47 +0100
      Re: Has anybody ever stacked two CPU coolers? David_B <DavidB@nomail.afraid.org> - 2020-07-26 00:17 +0100
        Re: Has anybody ever stacked two CPU coolers? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-26 00:30 +0100
        Re: Has anybody ever stacked two CPU coolers? Snit <usenet@gallopinginsanity.com> - 2020-07-25 16:57 -0700
          Re: Has anybody ever stacked two CPU coolers? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-26 15:35 +0100
            Re: Has anybody ever stacked two CPU coolers? Snit <usenet@gallopinginsanity.com> - 2020-07-26 10:22 -0700
              Re: Has anybody ever stacked two CPU coolers? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-26 19:44 +0100
                Re: Has anybody ever stacked two CPU coolers? Snit <usenet@gallopinginsanity.com> - 2020-07-26 11:46 -0700
      Re: Has anybody ever stacked two CPU coolers? Chris <ithinkiam@gmail.com> - 2020-07-26 10:16 +0000
        Re: Has anybody ever stacked two CPU coolers? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-26 15:35 +0100
          Re: Has anybody ever stacked two CPU coolers? Chris <ithinkiam@gmail.com> - 2020-07-27 07:05 +0000
            Re: Has anybody ever stacked two CPU coolers? Paul <nospam@needed.invalid> - 2020-07-27 05:14 -0400
              Re: Has anybody ever stacked two CPU coolers? Chris <ithinkiam@gmail.com> - 2020-07-27 18:12 +0000
      Re: Has anybody ever stacked two CPU coolers? "Carlos E.R." <robin_listas@es.invalid> - 2020-07-26 13:27 +0200
        Re: Has anybody ever stacked two CPU coolers? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-26 15:34 +0100
          Re: Has anybody ever stacked two CPU coolers? "Carlos E.R." <robin_listas@es.invalid> - 2020-07-26 20:50 +0200
    Re: Has anybody ever stacked two CPU coolers? Rene Lamontagne <rlamont@shaw.ca> - 2020-07-25 19:43 -0500
      Re: Has anybody ever stacked two CPU coolers? Paul <nospam@needed.invalid> - 2020-07-25 21:45 -0400
        Re: Has anybody ever stacked two CPU coolers? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-26 15:29 +0100
          Re: Has anybody ever stacked two CPU coolers? Paul <nospam@needed.invalid> - 2020-07-26 13:46 -0400
      Re: Has anybody ever stacked two CPU coolers? "wasbit" <wasbitREMOVE@hotmail.com> - 2020-07-26 10:03 +0100
  Re: Has anybody ever stacked two CPU coolers? Peter Johnson <peter@parksidewood.nospam> - 2020-07-26 17:01 +0100
    Re: Has anybody ever stacked two CPU coolers? "Commander Kinsey" <CFKinsey@military.org.jp> - 2020-07-26 18:05 +0100

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