Quote:
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Originally Posted by bobkoure
Airflow doesn't come into it. If your waterblock is performing more efficiently, then whatever it is cooling will be closer to coolant temp. Many waterblocks become more efficient as flow rates go up (and some, like the Swiftech 6000 series, don't change that much as flow rates go up - look at the performance curves - flat means water flow rates don't matter so much).
Also, just as a basic physics thing, heat energy flows more rapidly as the temperature difference becomes greater. So, with lower airflow, your coolant will be warmer, so less difference between this and your CPU, so the waterblock will be less efficient. On the other hand, the difference between your coolant temp and the air becomes greater, so your radiator will be performing more efficiently...
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when the coolant flow is increased from 1lpm to 12lpm
this graph shows a nearly flat curve a 7v fan which indicates at lower airflow increasing coolant flow only increases the heat dissipated slightly
however, with the same fan at 12v there is an improvement of nearly 50 watts
and 2 of the sames fans at 12v gave a 75 watt difference
image borrowed from
here without permission sorry and thanks