Desktop CPU Power Survey
 

"What is the best power efficiency achievable with currently available AMD and Intel processors that can be used on a desktop PC?"

It is not possible to answer this question comprehensively with precision without access to dozens of processors and test beds, and an enormous amount of time, manpower and resources. Still, we managed to get a good sampling of the processor families that represent the vast majority of CPUs actually being bought and used for desktop PCs today. We used the test methods that worked well for the Turion 64 article.