Intel "Pentium D" and "840 Extreme Edition" Dual-Core CPUs
 

Smithfield (current stepping A0) is based on the Prescott 1M core with
E0 stepping. This core is known for high overclocking potential. On the
other hand, knowing that Smithfield consumes at least 15% more power and
runs hotter than the already hot Prescott, we did not expect much when
we started overclocking. The reality was a pleasant surprise.

Review URL:
http://www.overclockers.com.au/article.php?id=384519