What about using diamond to pull the heat away from these components instead of water? Diamond is 4-5 times more thermally conductive than copper, can be put into heat sinks in various configurations, and can give similar or better results than water cooling when applied as a thermal transfer agent. The trick to using diamond is managing the thermal junction between the diamond and the additional material used to transfer the heat out of the box (because obviously one can't create diamond fins). Diamond in itself is not a good heat sink, but it is an excellent thermal transfer material. Point cooling can easily be accomplished, and this has already a proven solution for laser diodes and the like. IIRC diamond is already being used in some Cisco products. -- -------------------------------------------------------------------------- Stephen Kowalchuk skowalchuk@diamonex.com Diamonex, Incorporated The wise therefore rule by emptying hearts and stuffing bellies, by weakening ambitions and strengthening bones. -- Lao Tsu --------------------------------------------------------------------------