First Look at Presler
 

However, we shouldn’t also disregard some drawbacks of the NetBurst architecture, which remained even after the transition to 65nm process. I am talking about high heat dissipation and power consumption of the new Presler based processors. Although more advanced production technology allowed to bring these parameters down a little bit, they still remained as high as those for the top-end single-core Prescott based CPUs. The typical heat dissipation of the new Pentium Extreme Edition 955 is even set at 130W by default.

http://www.xbitlabs.com/articles/cpu...y/presler.html