Overclockers Australia posted a review on the Intel Pentium D 920 and 955 Extreme Edition

According to “Moore's Law”, the number of transistors on a chip roughly doubles every two years, resulting in more features, increased performance, and decreased cost per transistor. Almost in line with Moore’s law, Intel has been increasing transistor density in 2-year steps since 1990. The latest step is the move from 90nm to 65nm technology.

Intel Pentium D 920 and 955 Extreme Edition Review