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Liquid Metal Cooling - Page 3

post #21 of 28
A week ago I wouldv'e recommended you this stuff.

http://www.performance-pcs.com/catal...oducts_id=4373



However, failed attempts at speading it left with worse temps than regular AS5. The thing is a PITA to spread. It is like mercury.

And the second downside is that it bonds to your dies. I've actually found bits of the corners of my Sandy die broken off while removing my waterblock.

And you must lap your waterblock/HSF if you plan on reusing.
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post #22 of 28
depending on where you live..
thats not a surety.

In JAmaica - no prob

But.. in alaska :+ / anywhere with an AC
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post #23 of 28
Mercury, if I remember right, doesn't transfer heat that well. Same thing with gallium, and it would freeze in your system when cool.

Now as far as liquid metal cooling, it looks like people have lost their collective memory caps. Sapphire had a
Radeon X850 XT that never made it out of show model stage that was liquid cooled. It used a special liquid alloy and electromagnetic pumps. It had a thermal conductivity about 65 times better than water, and preformed remarkably well. Production issues floored it though.

Pretty pictures:



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post #24 of 28
Quote:
Originally Posted by The Bartender Paradox View Post
Mercury, if I remember right, doesn't transfer heat that well. Same thing with gallium, and it would freeze in your system when cool.

Now as far as liquid metal cooling, it looks like people have lost their collective memory caps. Sapphire had a
Radeon X850 XT that never made it out of show model stage that was liquid cooled. It used a special liquid alloy and electromagnetic pumps. It had a thermal conductivity about 65 times better than water, and preformed remarkably well. Production issues floored it though.

Pretty pictures:



That is one ugly graphics card, neat idea though.
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post #25 of 28
I believe that CoolLaboratories Liquid Pro TIM is based upon gallium. I believe it eats away at aluminum.
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post #26 of 28
i believe this is the same concept......

http://www.overclock.net/water-cooli...l-cooling.html
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post #27 of 28
Quote:
Originally Posted by Ihatethedukes View Post
That's the point I'm trying to make Duckie, if you used something with a low specific heat it'd "give up" heat a lot faster in the rad, doubly so because the energy put into the fluid from the processor would increase the fluid's temp more. Essentially causing a higher delta T compared to water. The high Delta T in the rad would increase the speed of heat transfer out of the fluid into the air. You really couldn't tell without actually doing it.
NoNoNo Specific heat capacity has nothing to do with 'how fast' a substance absorbs or 'gives up' heat energy. It is a measure of how MUCH energy 1Kg of substance needs to absorb to raise its temperature by 1C. As far as I can remember, water has a bigger SHC than most metals (this from memory so maybe wrong) therefore, while in principle the liquid metal idea will work as a cooling solution, water will be better (not so much temp. difference for energy input).

Having said that, water boils at 100C, not sure of boiling point of Gallium etc. but if it's higher, and loop is built accordingly, you may be able to offset the lower SHC by having a fluid that can absorb more energy before it boils! Would be bloody hard though.
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post #28 of 28
Thread Starter 
Just so those of you know that have been talking about the metal freezing, it would have to be in a very cool environment. The liquid metal alloy I was looking to use is liquid at -20c. I'm not really sure how well it conducts heat, have to do some experiments to find out, but the alloy is made up of Gallium, Indium and Tin. Indium is actually a decent conductor, and your likely staring at some now (used in LCD's), so it would probably help with heat transfer.

And I was never really intending to use the standard water pumps, I knew I'd have to upgrade em. Was actually thinking of using screw pumps, but I like the idea of magnetic pumps better (less likely to break down). Really this is just a thought experiment for now. I really want to try it sometime, but I definitely need to do some research into the alloy. Need to see how it reacts to all the substances in the system, find out the boiling point, see if it has the properties of pure Gallium (gallium becomes less dense when solid, like ice).
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