No, because with each successive material listed, the density and weight goes up. We all know how much the newer copper sinks weight. But enough on the science front. Let's see what we got. What Zalman has done with their sink design is to increase the surface area and lower the weight by constructing their sinks with fifty 20mm x 65mm x 0.3mm thick fins to make for a surface area of 2,800 cm2.
Heat dissipates via a process called convection.
The greater the surface area the faster the heat dissipates into the air. What we have in our hot little hands today is the Zalman CNPS 3100 which is made of copper. Back to the sink's construction, notice how the base of the sink is actually the fins we noted earlier, bound together, VERY tight and nice, between two blocks of aluminum. Pretty sharp is you ask me. There is one other thing that is unique with the Zalman heatsinks.