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Message: <blockquote data-quote="Danny" data-source="post: 178323" data-attributes="member: 132">You've misunderstood already, I didn't say aluminium conducts heat better than copper, it only releases heat faster. From the heat properties posted earlier :-Specific Heat @ 25°CAl 900 J K-1 kg-1Cu 385 J K-1 kg-1* shows that it can hold more than double the heat compared to copper, thus the ability to hold more heat = the ability to release more heat. This a fact, not merely my opinion. The reason I compared both Thermalright heatsinks is to show you that although copper absorbs heat better than aluminium it does not release heat as fast, even with 2 similar designed heatsink and the copper having larger surface area. Even from your link, it was mentioned 'Optimally designed Aluminum heat sinks meets or exceeds thermal performance of Copper or Copper based heat sinks'.As for Cathar's blocks and any water block for that matter, almost 100% of the time copper is used. The main reason - it absorbs heat much better than aluminium & the cost difference isn't too much compared to silver. Since water conducts heat much faster than air, it compensates and aids copper's poorer heat release properties. copper + water combination has the best of both worlds ie. very good heat conductor (copper) & very good heat release (with the aid of water).This same cannot be said about air cooling since there is no water to aid copper's poor heat release. That is why when copper is used for any heatsink related product, there must be a very fast fan or air blowing onto it to help release heat.</blockquote>

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