Keeping a PC cooled has always been part of the process with building a PC. Not a new idea, I've been talking with a coworker about going from the water cooled PC to a complete submersion of the PC components in mineral oil. I'm been reading about it and it might be the next PC build I might make.
http://www.pugetsystems.com/mineral-oil-pc.php
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Mineral Oil Cooled PC
Puget Custom Computers specializes in custom built high performance computer systems for business and home; including computers with Linux OS installed.
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$600 for just the case? Uh, yeah…