by ChumpusRex2 » Sat 25 Mar 2006, 08:15:22
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Would that really work? Wouldn't the oil interfere with the electrical connections? And how effective would oil be as a coolant?
Oh it does work. Liquids are dozens of times more effective as coolants than air. (Hundreds of times if you don't want to use fans).
The problem is that vegetable oil contains acids and traces of water. There isn't enough water to upset the operation of the equipment - but there is enough to cause electrically induced corrosion within a relatively short period of time.
If you want to use immersion cooling of electrical/electronic equipment you need to use ultra-pure mineral oils or perfluorocarbon liquids. (Such cooling systems were used on Cray supercomputers).
Going back to the $10k dell PC. Well, it's really a status symbol of excess.
Looking at the specs, it's a very high specification piece of equipment, and given the current cost of the parts, actually represents very good value (even though the parts themselves may not).
Trying to DIY a similar machine wouldn't save you that much - maybe 10%. You've got a $1200 CPU, 2 $1200 graphics card, a $2200 monitor, 3 $300 hard drives, a $300 accelerator card, a $300 sound card, $300 of RAM and a $300 mainboard.
Considering that Dell has already found a PSU and cooling system that can deal with that monstrosity, and that you get a warranty (even though the CPU is being run outside of its design ratings). And you get some software thrown in - the Dell isn't that bad of a deal.