malwareThe new 45nm Wolfdale Core 2 Duo E8000 CPUs have a new cooler bundled with the BOX package. As you can see below, the cooler is similar than the one found in Intel's 65nm Conroes. This move probably helps Intel trim down the manufacturing costs, but mostly comes to show one big plus of the 45nm process and that's the lower heat output.



Source: TechConnect Magazine, matbe

When airflow speed is below 400 linear feet per minute and/or the heat input area
is a high percentage of the heat sink base area the extra cost of copper may not be
justified.

largonNote that it doesn't say alu performs better with low air flow, but that the ratio of cost-per-gain is too not worth it at low airflow.
From the PDF:Economical / industrial point of view ≠ hardware enthusiast's point of view
;)