Quote Originally Posted by ryboto View Post
That's crazy talk. The EXACT same amount of heat that was produced when you were using an aluminum heatsink will still be produced, not more, not less. Assuming you're using the same CPU at the same voltage/clock. The only thing that's changing now is that your conductive surface conducts heat much much faster. In both cases(Al/Cu), the limiting factor for heat transfer is the convective heat transfer resistance, since heat transfer to the air is dependent on the convective heat transfer coefficient, which is directly related to the velocity of the air over the surface you are cooling. So, in either situation, high speed fans will help. You wont need higher speed fans just because it's all copper.
Buddy, copper has the 3rd highest thermal conductivity on Earth, behind diamond and silver. That means that whatever heat was transferred to the aluminum was dependent on the aluminum's ability to conduct heat energy. Now, since copper's conductivity is HIGHER, much MUCH higher (401 vs 237 W/(m·K)). That means that at any given time, it will be transferring and thus storing more heat energy than the aluminum version. Soooo that means that in order for the heatsink to not become overpowered by its own thermal conductivity, it needs to GET RID of the heat it conducts at a faster pace as well. Hence, the reason for more powerful fans.