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Originally Posted by rocketmanx
You take a pan out of the oven and stand in front of the fan for a few moments to enjoy the breeze but spend the same amount of total time going from oven to counter with the pan. Which ones gonna be cooler?
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The second scenario pan will be cooler, but what you are ignoring is that the next pan has to sit in the oven longer while you are dawdling with the one in front of the fan. The next pan gets to a higher temperature and the same amount of time in front of the fan as the pan before will not cool it down to the same level.
Liquid cooling systems are a closed loop. the slower you let the water go through the radiator, the more heat you can suck out of it, but you also have to realize that the water flowing through the blocks has to flow slower as well, making it absorb more heat and counter any real advantage the slower flow through the radiator produced.
Generally, it is considered to one's advantage to run the liquid loop as fast as possible to get the best turbulance and thusly heat transfer inside the water blocks.
The extra heat that doesn't get removed from the water because it passed throught the radiator so quickly will have a chance the second time around. Because it passes by the CPU so quickly, there is less heat per unit water for the radiator to remove.