[Beowulf] 96 cores in silent and small enclosure
hunteke at earlham.edu
Thu Apr 8 06:38:38 PDT 2010
At 12:57am -0400 Thu, 08 Apr 2010, Jonathan Aquilina wrote:
> i know there is non conductive water which if it gets on
> something shouldnt conduct electricity but how safe is a
> water cooled system?
As regards non-conductive water, you're correct: *pure* water has a very
high resistivity, something like 18 MΩ-cm. (Effectively, not conductive
for home-uses.) However, pure water has to be manufactured, and water
is also very good at dissolving and dispersing conductive ions. (Sugar
with tea, anyone?) So, it's still not smart to play with a toaster in
I have no experience with water cooled systems specifically, but I
believe the point is to suck heat from the high-heat components, and not
to just willy-nilly douse your entire box in water. For instance, you
might replace the standard fan and heatsink on top of your CPU with a
waterblock. The water would then be pumped through tubing of some kind
to the waterblock (on top of the CPU), and back to a cooling radiator of
some kind. The water never leaves it's circuit, but still disperses
heat from the top of the chip in the socket.
How safe is it? I can't answer empirically (no experience), but in
theory it's just as safe as air. Water is never in contact with any
electrically charged object, and never leaves it's tubing channels.
More information about the Beowulf