Internal evolution of the Core 2 Quad CPUs

As time goes by, CPU manufacturers improve the production of their processors, by subtly modifying their dye or their manufacturing process. It allows either an increase in frequency, a better productivity or a diminishing power consumption.
This last point has been improved by Intel on Core 2 Quad Q6600 (4 core CPUs). Thus improved, their thermal dissipation just went from 105 to 95W.
A 10% gain is quite notable and will allow an easier cooling. It's likely that these modifications will be applied to other 4 core CPUs such as the Xeon, in the future. It might even be the case already in the 3 GHz Xeon 5365 that Apple fits in the Octo Core Mac Pro.
As it is, while the 3 GHz Dual Core Xeon dissipates 80W, the 4 Core model only dissipates 150W instead of the logical figure of 160W. So here again 10W have been gained.