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del
June 21, 2011, 07:17:34 PM
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June 21, 2011, 08:09:37 PM
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good luck getting that much mineral oil, and sealing all those joints. might as well get a wind tunnel.

It is pitch black. You are likely to be eaten by a grue.

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June 21, 2011, 08:31:47 PM
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I was in when watercooling started out, everything was selfmade. Besides from hours of face grinding my CPU and building CPU watercooler from standard CPU Aircoolers we talked much about alternatives. Sinking in oil was one of them. In the end, nothing beats a watercooling if you see all aspects and not just searching any temporary highscore (use azote cooling for this(1)) or just want to do it for the fun. You need special, expensive oil or your hardware takes damage over time. You need to cool the oil, so you need pumps and radiators. And if you have to change something on your installation, its a real mess.


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June 21, 2011, 09:30:07 PM
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haha i totally remember the liquid N2 attempts.  didn't one of the chips explode or crack?
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June 21, 2011, 11:19:56 PM
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I've been playing with oil immersion for a couple years, and its definitely not cheap.  I bought all my oil from a local feed store.  They stock the stuff as a horse (and other livestock) laxative.  The cheapest I've found it was $20/gallon.  Plus you will need pumps, radiators, heat exchangers, and fans.  Also, as pointed out by someone else, Oil makes a huge mess.  My hardware is basically inaccessible unless i have a full afternoon to play around with it.  Finally, plunging your equipment into mineral oil is a pretty good way to void the warranty, so if it breaks its your problem.

My gaming rig right now has a pump and a heat exchanger, connected to chilled water with a water chiller in the garage.  I can keep everything under 60C even while mining.  My mining rig is in a separate tank with just a pump and a radiator+fan.

Distilled water doesn't conduct electricity.  However, distilled water will not stay distilled for very long, especially if you dunk stuff with metal pieces into it.  I saw a forum post once where someone tried it with an old computer to see what happened.  If I'm remembering correctly it only took a few minutes before the computer shorted out.

I keep the cooling for each tank separate.  If they were connected it would be somewhat easy for the pumps to be slightly unbalanced and overfill one tank while emptying another.  You could install float switches and additional pumps to keep this from happening, but that would increase the cost and complexity.

The reason I do it?  I can keep my cards 50-55C while mining, lower for gaming. It is almost completely silent in my living room.  This kind of thing isn't really practical for mining rigs, unless you already have the equipment and oil, and you enjoy playing with it.  Oil immersion is a hobby.
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