Unless used in a heat tube, in which case water would be the better choice anyways unless -0c cooling is used.

Heat pipes with water can actually go below zero. Well below zero in some cases. With liquids, the pressure is lowered, so they stay in liquid and gas forms for a wider temperature range. 1LPM is scary. It's so small! 10W for 200mL per minute is TERRIBLE. That makes the Mag 3's and the MD20RZ's heat figures look good.

I thought that water under a lower pressure froze @ the same point hmmm...

actually water under a vacuum of .006 atm freezes @ -.01c

From Thermacore:
"Q. Do water heat pipes freeze?
A. Yes, heat pipe working fluids including water maintain the normal freezing point. Properly designed heat pipes, however, will not be damaged by the freezing and thawing of the working fluid. Heat pipes will not operate until the temperature rises above the freezing temperature of the fluid."

That's true for most liquids, however for water, as pressure is increased then water will remain a liquid at lower temperatures.

In fact, under a pressure of ~210MPa (~30500 PSI), water can remain as a liquid down to -22C.

yeh, if I had my scanner up i'd scan the state chart for water. thats whats great about it, its the only chemical that remains liquid the higher pressure/lower temp you go.

Oh yeah, that would make sense... Forgot about ice being less dense than water. :(

Cathar, you say you gave up on the microchannels GPU block. Can't you do a design similar to the Cascade? It doesn't hurt flow too much, and it's the best cooling around...

That's exactly what I'm doing...

If no moving parts means it cant breakdown, y the hell cpu's fail (afater many years of use/abuse) and psu fail eventhough they havent been over loaded?

No moving parts means its simpler so is less likly to fail and/or will last longer.

Everything fails eventually. else it would b possible for life to become immortal, n i dont c that happening, ever. LOL

EDIT: sorry, i read that as dose mean no break downs. Man is my concerntration all over the place. I reall shouldnt work l8 nites!