Quote:
Originally posted by dcrainman
In my opinion (I have seen several VERY long arguments about this) the copper is only needed where the water is coming in contact with the heatsink... I feel that Al is better at dispersing heat in to the air buy Cu does a better job with water. Also remember don't mix metals in the water system or you'll get corrosion 
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Well, you go on believing that if you want...
Copper has a higher heat capacity, and heat dispersion than Alu, regardless of wether it's in air or water. The only substance that wil do better, without costing an outrageous amount of money, is Silver. Ask any of the old-timers here...