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Liquid Cooling With Mercury? - Page 9

post #81 of 115
Guys, stop it with the insults.

LHe will only get you down to around -230C when it comes to CPU cooling, it's added after the pot has been cooled by LN2, sometimes extra LN2 is added to keep the LHe from boiling so fast. LHe is used by directly adding it to the bottom of the pot (open of course) through some flexible transfer tube (or whatever they call the thing that you use to take the LHe from the dewar) It can't be poured like LN2 can.

With LHe the biggest problem is finding chips that actually benefit from the cold, most intel chips for example would most likely cold bug by the time they reach -230C. LHe is also much harder to control than LN2, you need multiple guys handling the setup with LHe and controlling the pot temp becomes harder when you can't just pour more from a thermos.

Also at the moment the 8350 record is 8.795GHz.

For 24/7 stuff phase change and cascade phase change are pretty much the cream of the crop, DICE, LN2 and LHe are only useful for very short runs.
 
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post #82 of 115
Quote:
Originally Posted by Alatar View Post

Guys, stop it with the insults.

LHe will only get you down to around -230C when it comes to CPU cooling, it's added after the pot has been cooled by LN2, sometimes extra LN2 is added to keep the LHe from boiling so fast. LHe is used by directly adding it to the bottom of the pot (open of course) through some flexible transfer tube (or whatever they call the thing that you use to take the LHe from the dewar) It can't be poured like LN2 can.

With LHe the biggest problem is finding chips that actually benefit from the cold, most intel chips for example would most likely cold bug by the time they reach -230C. LHe is also much harder to control than LN2, you need multiple guys handling the setup with LHe and controlling the pot temp becomes harder when you can't just pour more from a thermos.

Also at the moment the 8350 record is 8.795GHz.

For 24/7 stuff phase change and cascade phase change are pretty much the cream of the crop, DICE, LN2 and LHe are only useful for very short runs.


exactly what i was saying.
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post #83 of 115
Quote:
Originally Posted by Fieldsweeper View Post

btw O2 wont freeze right out of the air like that, its combined and not submerged, you CAN get very small condensation that forms directly on the LHe apparatus that begins to evap the LN2 first then you will have liquid O2 droplets, POSSIBLY, but this has been done before with barely any additive precautions than overclocking with LN2 watch the vids i posted.

In the case of cooling by lasers and in many situations described in this thread, the speed at which heat would be taken away from atmosphere around the parts would make O2 freeze right out of the air, and yes it would be horribly dangerous. Nevertheless this has become an argument about chilling gasses and there are conversations elsewhere about that...
post #84 of 115
gaphen is still more thermaly conductive than dimond ... water and almost all other materials a simple heatsink out of that will outproforme almost anything maby not phase since it still cant go lower than ambiant i was going to make a sink out of it tell i saw the price i reasionable block will set u back about 2 grand
post #85 of 115
Quote:
Originally Posted by mindblowingj View Post

This, in a much larger setup, using an external electromagnetic pump, its just liquid metal acting the same way as in an evaporation chamber in heatsinks. If it were combined to a pump and real radiator it would probably be amazing. Its the most realistic way to approach this "realistically"

Going large scale would of course change things, I am only considering what I have seen in enthusiast size builds.
Going large scale, sub 0 degrees, OC records etc. makes water a potentially poor choice due to the physical properties of water.
post #86 of 115
ya, If you want longevity like a cooling you can actually use the computer on, then LHe or LN2 will not work unless you have constant stream of ln2, but that will be very costly.

but if all you are trying to do is one run, and break a record, by all means. but I like to use my computer for gaming/ 3d etc..

so for me peliter, water or phase change is the best option still. not too much else out there, other than variants on those.
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post #87 of 115
Water = 1 g/cm^3
Hg = 13.6 g/cm^3

Mercury would not work. It's way too dense. Also poison is kind of bad for you. wink.gif

However, gallium might work. As far as I can tell, it is biologically inert. It's solid at room temperature but melts at under 30 degrees C or about 85 degrees Fahrenheit. Anything using liquid metal cooling is sure to be overclocked, so we can assume core temperatures high enough to melt it. Its density is 6.1 g/cm^3 as a liquid, though it transfers heat about 20% as well as mercury. If someone can pull this off, please tell me.
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post #88 of 115
It's too dense to be pumped by a normal pump,the pump would need to be electromagnetic ^^ In this (theoretical and insane) setup, the problem with scale has been solved as after much looking i found it's now easy to order a quite small powerful enough pump for a reasonable price. I have tried to bump this and didn't get any response, Ill try doing some autocad drawing incorporating all the positive ideas i've seen yet to make it work. Posting if i get time tomorrow !
Edited by mindblowingj - 6/6/13 at 8:26pm
post #89 of 115
Gallium eats metal however. Aluminum with a video, copper with via a research paper.. http://www.youtube.com/watch?v=JHHI2Lk79cY http://www.osti.gov/bridge/servlets/purl/811932-smXmM0/native/811932.pdf
post #90 of 115
Quote:
Originally Posted by Laureolus View Post

Gallium eats metal however. Aluminum with a video, copper with via a research paper.. http://www.youtube.com/watch?v=JHHI2Lk79cY http://www.osti.gov/bridge/servlets/purl/811932-smXmM0/native/811932.pdf

:O Wow. Okay. I was not aware of that property. Don't use gallium.
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