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Watercooled heatpipe CPU heatsink - Page 3

post #21 of 52
10/25/10 at 9:15am
Quote:
Originally Posted by windfire View Post
Could you provide the XS link please?
So your theory is that the increased surface area of the fins will lead to increased cooling with the water passing over them?

Or is it that the heatsink is more efficient at cooling so by using the high thermal conductivity of water in combination with the heatsink this method will produce lower temps?

I can't think of a reason why you would want to do this, maybe you could elaborate on your thinking to help us better understand why you think this will be more efficient? I think it would help the thread.

From what I can see, all you are doing is increasing the distance of thermal transfer between the water and the CPU, which is less efficient/more in-efficient, however you would like to put it. Like I said before, there is a reason direct die cooling is some of the best watercooling you can get without doing some type of chilling.

Putting some type of medium in between the water and the IHS can and will only decrease the cooling efficiency.
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post #22 of 52
10/25/10 at 9:22am
Surely getting the heat into the water if you are using a water cooling loop is the key point. So a standard water block will be teh most cost effective and most efficient manner. The cooling of the water is key to performance is it not?
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post #23 of 52
10/25/10 at 9:30am
It's an interesting idea, and well considered. But, to really make it sensibly efficient, you'd really have to make at least a partial maze inside the container to make sure the water flowed evenly over each part of the heatsink inside.
Restriction of it wouldn't be a problem, simply because of the huge size of the thing, but you'd be seriously limited by the ability of the heatpipes to transfer heat. Heatpipes become efficient only when the difference in heat between the ends is big enough to allow for the evaporation and re-condensing of the fluid inside. The problem comes when the cooling of the fins is sufficiently great, the fluid is now only getting part way up the pipe before it has condensed again, thus making a large part of the array pointless, and also not reducing the cpu temps any further. A normal waterblock will continue pulling down temps until the loop is close to ambient if there is enough rad available.

TL;DR version: It will work, but temps won't be as low as a normal water block.
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post #24 of 52
10/25/10 at 8:33pm
Thread Starter 
Starting with a traditional air cooling setup (ie heatsink + fans), we have diagram A. I do not think I need to explain anything about this setup.

Air is now replaced by water as the medium to remove heat off from the fins (diagram B). Given that water is more thermally conductive than air, this setup will perform better than the above.

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post #25 of 52
10/25/10 at 8:37pm
This is basically having the radiator under water eh? Or actually 'in' the tubes itself?

Really good idea non the less though. I like where this is going.
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post #26 of 52
10/25/10 at 8:38pm
Quote:
Originally Posted by windfire View Post
Starting with a traditional air cooling setup (ie heatsink + fans), we have diagram A. I do not think I need to explain anything about this setup.

Air is now replaced by water as the medium to remove heat off from the fins (diagram B). Given that water is more thermally conductive than air, this setup will perform better than the above.
Completely pointless. You are only adding thermal resistance.

Traditional water cooling:
CPU->TIM->IHS->TIM->5mm copper->water

Your design
CPU->TIM->IHS->TIM->10mm copper base->bonding->130mm heatpipe->bonding->fins->water
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post #27 of 52
10/25/10 at 8:40pm
Thread Starter 
Quote:
Originally Posted by DuckieHo View Post
Completely pointless. You are only adding thermal resistance.

Traditional water cooling:
CPU->TIM->IHS->TIM->5mm copper->water

Your design
CPU->TIM->IHS->TIM->10mm copper base->bonding->130mm heatpipe->bonding->fins->water
I am just comparing diagram A with diagram B at this moment.

So, you think diagram B will perform worse than diagram A?
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post #28 of 52
10/25/10 at 8:41pm
Just use the water to directly cool the chip. This is pointless.
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post #29 of 52
10/25/10 at 8:44pm
Quote:
Originally Posted by windfire View Post
I am just comparing diagram A with diagram B at this moment.

So, you think diagram B will perform worse than diagram A?
Why bothering comparing something that works simply to something that is pointless?

Diagram B means nothing as you did not explain how water will be enclosed and cooled.

This would work better.



Edited by DuckieHo - 10/25/10 at 8:49pm
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post #30 of 52
10/25/10 at 8:49pm
How about a traditional waterblock, but with a HSF on top of it?
The water would remove the majority of the heat and a HSF takes care of any excess heat.
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