"Last are the general improvements to the data prefetch system. Prefetch allows the AthlonMP actually go out onto the front side bus and pregather data it will need before it's instructed to do so. This efficiency in processor development allows the new AthlonMP CPUs to have an inherent
advantage over previous generation Athlons."
FULL STORY @ SOURCEMAGAZINE (http://www.sourcemagazine.com/csm/Forum3/HTML/000040.html)