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The Technology Behind AMD's New Liquid Cooling Based Heatsinks

qubit

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#1
Following our article yesterday about AMD using new high performance liquid cooling technology for their upcoming 7900-series graphic cards, TechPowerUp can now bring you a detailed insight into how this technology works, which has been developed by Vapro Inc. The following slides will help to explain this technology.

Show full news post
 
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cadaveca

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#2
Next time, Qubit, can you re-size the image thumbnails in such a way that the text in the image is legible in the post itself? There's no way I'm going read this and have to click through 12 additional webpages with the images legible to be able to get the full information provided.

Thanks. ;)
 
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#3
The design objective for liquid coolers is to be fitted onto very high powered graphics cards, where 400W+ is expected to be consumed between the GPU and its supporting circuitry
So much for the argument that 28nm is likely to mean more lower power consumption. My guess is that the 28nm performance/enthusiast will still be nudging...or downright abusing the PCI-E spec in an effort to wring out as much performance as possible

/thank god for that.

more effective than the stock 8800 GTX vapour chamber cooler that this has been compared against
Either the wonders of marketing, or these guys have been on a verrrrrry slow ramp
 

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#4
Next time, Qubit, can you re-size the image thumbnails in such a way that the text in the image is legible in the post itself? There's no way I'm going read this and have to click through 12 additional webpages with the images legible to be able to get the full information provided.

Thanks. ;)
Use the lightbox on the frontpage.

http://img.techpowerup.org/111113/bta8764kjhd.jpg

We can't change the thumbnail size standard.
 
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#5
Good read!!! a ha, picture is becoming clearer now. ggreat bit of info to mull over, thanx!
 
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#6
Fit for 400W+ ... WTH? On 28nm that'd be enough for something over 3 times the power of current top-crop.
 
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#7
A very simplistic way in advancing the chamber cooling methods. Though it now seems totally obvious from my other hobbies and knowledge, mainly aquaculture and filtering type "fluidized bed". As here the object is creating surface area and the more the better in a small space - micro etching could be useful as well but creating more surface area in a given space is the key :) - very obvious now but I wouldn't have come up with anything like that so it does seem good to me - I want to see comparisons though on actual cooling comparisons at different angles done with multiple units of both types at different loads though lol.
 
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#8
Fit for 400W+ ... WTH? On 28nm that'd be enough for something over 3 times the power of current top-crop.
Well that is at 5000 RPM fans as always :laugh:
 

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#9
There's several questions not answered by the slides:

- What's the liquid used?
- What's the internal pressure? Standard atmospheric pressure would have water boil at 100C, far too high
- As the temperature rises, so does the pressure. A lot. And there's a fair amount of liquid in the cooler. How does it handle this?
--Is there some kind of safety valve?
---If it goes off, then the cooler becomes useless and the card either burns out or shuts down from an overtemp control

These are important questions that need answers.
 
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#10
it is insane - gfx cards pull more power than the rest of the pc together yet they remain cards...
 
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#11
There's several questions not answered by the slides:

- What's the liquid used?
- What's the internal pressure? Standard atmospheric pressure would have water boil at 100C, far too high
- As the temperature rises, so does the pressure. A lot. And there's a fair amount of liquid in the cooler. How does it handle this?
--Is there some kind of safety valve?
---If it goes off, then the cooler becomes useless and the card either burns out or shuts down from an overtemp control

These are important questions that need answers.
The pressure is very low. The liquid start to boil as soon as heat is applied, even if the GPU is 40 degrees some liquid is boiling but its never under any real pressure.

The liquid is probably a trade secret but usually a combination of ammonia, water, acetone and methanol for consumer electronics.

They use liquid metals for hardcore industrial purposes that can cool more than 1000 degrees but I dont think they use metals in graphics cards lol.


http://www.thermacore.com/frequently-asked-questions/default.aspx
 
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#12
There's several questions not answered by the slides:

- What's the liquid used?
- What's the internal pressure? Standard atmospheric pressure would have water boil at 100C, far too high
- As the temperature rises, so does the pressure. A lot. And there's a fair amount of liquid in the cooler. How does it handle this?
--Is there some kind of safety valve?
---If it goes off, then the cooler becomes useless and the card either burns out or shuts down from an overtemp control

These are important questions that need answers.
There are many things that could work and work well.


Freon
Water under vacuum
Ammonia


http://www.benchtest.com/heat_pipe1.html


For the actually minute amount of liquid and strength of tubing and solder I'm not anymore worried about the copper than I am the aluminum tubes in our home A/C that carry liquid under almost 200PSI of pressure and it being hot.


Ammonia coolers are still in massive use today as a much more cost effective setup, and in use in many RV's and other places by using a hot bulb pump.
 

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#13
woah this is actually high tech shit!
 
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#14
can you re-size the image thumbnails in such a way that the text in the image is legible in the post itself?
Yeah, how you do that? How can you post big images? I still don't know. :( :cry:
 

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#15
 
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#16
This is too science-y for me to comprehend

But if since it's better than the current coolers, that's good
 

qubit

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#17
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#18
small pictures on the page

It's just because your GPU card is still using the old type cooling.
Larger pictures might overheat your oldfashioned pre-2012 45nm GPU