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Originally Posted by Ares
isnt the whole point of water cooling to get the heat from the restricted space of the CPU out of the case where you can fit lots more surface area to still ultimately radiate heat to the air.
but no matter what your 100% efficiency with a radiater is to hit ambient temp. without something more than air on metal, its impossible to ever ever ever get under ambient. right?
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Not necassarily out of the case but that is good to. The goal is to be able to have a device that is as optimal as poosible to trasnfer the heat from the CPU (Usually the water block) to the coolant then to transfer the heat from the coolant to somewhere else (Usually a radiator and into the surounding air). The better the water block the more efficent the heat can be transfered in to the water and the more efficent the rad setup the more heat from the water can be transfered into the air. And then that air is hopefully cooled by convection of the surrounding enviroment.
There is no way to even get ambient temps from anything other than active cooling of the coolant wether that be air on the HS or water in the water block. Something unatural has to be cooling the coolant being applied to the heat exchanger. That could be a ducted A/C cooled air blowing directly on the HS or it could be chilled water running through the water block.