FrostyTech posted a Stock Intel Pentium D Radial Curved non-Bifurcated Fin Heatsink Review

In this review, Frostytech is going to evaluate the stock heatsink model that accompanies most Intel Pentium D processors. It closely resembles just about every other Intel RCBFH heatsink, except that single fins are used in place of bifurcated ones. Intel's own Radial Curved non-Bifurcated Fin Heatsink (RCBFH) reference solution is a fairly well designed cooler; it uses a 4-pin PWM 84mm diameter Nidec F09A-12B4S1 fan that scales in speed to meet thermal demands, it conforms to ATX motherboard keep-out and high recommendations, it relies on an efficient and light weight mix of copper over the integrated heatspreader and high aspect ratio extruded radially curved aluminum fins, and it installs or removes from a motherboard in a snap without the use of tools.

Stock Intel Pentium D Radial Curved non-Bifurcated Fin Heatsink Review