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Thread: JetCool touts 10x better cooling for high power processors

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    Senior Member Xlucine's Avatar
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    Re: JetCool touts 10x better cooling for high power processors

    This is huge - it's like a new startup claiming to match the performance of a top-end desktop CPU with a chip that only needs 0.1 W. Convective heat transfer is really hard, so the only way to deal with the heat flux from a modern chip is to massively increase the surface area (by ~3 orders of magnitude for a typical fin stack). With this product offering a convective heat transfer coefficient 3 orders greater than air, you can skip the whole thing, and a lot of heat transfer textbooks will have to be re-written.

    Normally, the thermal resistance of the heatspreader and such is negligible when you're cooling a CPU/GPU - it's so hard to get the heat into the fins that the bulk of your temperature difference is there, and so you only see a degree or two across the packaging and the like (for a typical GPU heat flux, ~1C/mm of copper heatspreader thickness out of the 60C between the GPU and the air). With this design you can shed GPU-level heat fluxes (~300 kW/m^2) for ~2 degrees temp differential between the chip and the coolant, which is insane and explains why they're complaining about the thermal resistance of the heatspreader.

    Whichever GPU manufacturer jumps on this first will have a field day until the patent runs out. Cooling like this covers a multitude of sins in the silicon design - you'll be able to shed silly amounts of heat as the negligible temperature difference between the coolant and the chip means you can run the coolant hotter, which gets you more heat shed from a given radiator size for a given airflow. It should also massively reduce hotspots in the chip - if a section of chip gets 10 C hotter than the rest of the chip it'll be subjected to ~1 MW/m^2 of cooling locally, so will not sustain the temperature difference for long

    Quote Originally Posted by AndyM2012 View Post
    See also: water jet cutter?
    Those use abrasive grit in the water

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    Re: JetCool touts 10x better cooling for high power processors

    Quote Originally Posted by Tattysnuc View Post
    and what happens when the nossles block?
    You swear, curse, and then strip everything down over the course of three consecutive evenings.
    _______________________________________________________________________
    Quote Originally Posted by Mark Tyson
    like a chihuahua urinating on a towering inferno...

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    Re: JetCool touts 10x better cooling for high power processors

    Quote Originally Posted by Xlucine View Post
    Originally Posted by AndyM2012
    See also: water jet cutter?

    Those use abrasive grit in the water
    Phew! Good job there won't be any cavitation to generate grit.

    While I agree that it appears to be a great idea, I'd want to see how the chips stand up to it over a few years in real life.

  4. #20
    Senior Member Xlucine's Avatar
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    Re: JetCool touts 10x better cooling for high power processors

    Quote Originally Posted by AndyM2012 View Post
    Phew! Good job there won't be any cavitation to generate grit.

    While I agree that it appears to be a great idea, I'd want to see how the chips stand up to it over a few years in real life.
    There shouldn't be, so long as the pump isn't pulling a vacuum in the heat transfer chamber

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