The Pentium D: Intel's Dual Core Silver Bullet Previewed

Intel Reference Cooler With More Copper And Larger Surface

The copper core is quite obviously bigger than before.

All Intel boxed processors come bundled with a suitable cooler. Due to the increased maximum thermal design power of the fast Smithfield models, Intel made some changes to their reference cooler design; they increased both the surface area and the size of the copper core in order to improve heat dissipation.

The old cooler: the fins are split into two branches.

The new guy: there are more fins now and they are thinner.