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What is a non conductive liquid

post #1 of 22
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I am thhinking about butilding a heat pipe/ phase change system. I was thinking that I could take a noncouductive liquid in a "ring" on the bottom of my gpu as the heat sink is on the bottom and we all know heat rises. The liquid would sit on the card and evaporate and rise to the top of the container and condense. Then it would fall. What is a non conductive liquid I could do this with or a non conductive container that conducts heat well? Alcohlol/methonol/ethonol?
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post #2 of 22
What you are basically talking about is a heatpipe. There are heatpipe coolers out there for GPUs. That would be your best bet.

If you were to attempt your own heatpipe construction a high volatility liquid would probably be the way to go. Somthing that converts to the gas phase pretty easily. You would still need to have radiator fins to effectively cool though and you would still need air moving across those fins.

I say, why reinvent the wheel? Just get an after market GPU heatsink with heatpipes.
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post #3 of 22
A homemade phase change unit, thats a good project mate.
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post #4 of 22
Thread Starter 
Quote:
Originally Posted by Mjolnir
What you are basically talking about is a heatpipe. There are heatpipe coolers out there for GPUs. That would be your best bet.
More or less. I have a copper dish with a plastic rim that would work perfectly (dont ask where I got it.). This will be a lot larger than a regular heat pipe though. That is why I need a non conductive liquid that can touch the board or a low thermal resistant material that insulates electricity that can be put on the board. I want this to cool the magority of the card. Am I off y rocker or is this remotlly possible?

Heatsink that is my next project. Hopefully there will be a working fridge or to at the dump....
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post #5 of 22
Here's some more info on heat pipe technology:
http://www.heatsink-guide.com/
http://www.cheresources.com/htpipes.shtml

good luck with your build.
    
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post #6 of 22
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I found my liquid. It's napatha aka lighter fluid. It has a low evap temp. However the more I thougt about it I don't like the idea of the liquid touching the board. Can any one send me a pic of the back of a 6688 gt or ultra with out the heat sink mouting thing? If the back has insulated points then I could get away with a metal container. I am going to look for a new container. Thanks.
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post #7 of 22
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Can I insulate the bottom of my can with a thin layer of scotch tape? If yes then I will use a rustolium can that is about 3'' tall. I will use a 90* joint, have it go out and go for 3 ". Then the pipe will go into a loop that will be blown on by a fan. Then the pipe will go down the side of the can. The pipe will inter the can at the lowest point possibe. Will this work? Can I insulate with scotch tape?
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post #8 of 22
IMO... save yourself some time & money and get a aftermarket HSF.

If your home-made cooler fails, you could be facing a bill for a replacement gpu!
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post #9 of 22
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Quote:
Originally Posted by Zeus
IMO... save yourself some time & money and get a aftermarket HSF.

If your home-made cooler fails, you could be facing a bill for a replacement gpu!
But I have everything I will need. This isn't replacing my stock cooler. The stock cooler points down and as we all know heat rises. So I will keep the stock cooler where it is and put this on top to take the heat off the bottom side that is facing up. See my rig profile and you will see what I mean.
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post #10 of 22
ahhh.... I see what you thinking of...

Instead of building a heatpipe system, you might able to use a 80mm fan blowing on the back of the card. I think Zalman do a fan bracket that would allow you to position a fan over the card thus getting cool air on the back of the card.
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