Quote Originally Posted by Nickel020 View Post
Wrong, thermal conductivity and resistance, just like electrical conductivity and resistance greatly depends on temperature.

With all the bull that fan manufacturers are putting out with their cfm and dB claims I just don't trust manufacturer data very much anymore. Neither should you
I think you did not understand what I was saying. The same type of metal will have the same thermal conductivity and resistance properties at the same temperatures, and different types of metals each have different thermal conductivity and resistance properties. However, these are consistent and comparable. It's not like one day copper acts like an insulator and another day it acts like a conductor at the same temperature. Hence, they are perfectly comparable based on their thermal conductivity and resistance. You can easily (well relatively easily) determine which will perform better.

Point taken on trusting manufacturer data however. I am not one to trust it generally. They always skew results to make their products seem more appealing. As you said fans are a good example.