Intel’s new Xeon 5500 series - Nehalem' architecture

Features of the product

Next-generation Intel® microarchitecture

Intelligent next-generation Intel® microarchitecture adapts to the workload, automatically increasing processor frequency for greater performance

Intel® Turbo Boost Technology

Better performance enabled by Intel® Turbo Boost Technology, increasing processor frequency and enabling faster speeds when conditions allow

Intel® Intelligent Power Technology

Lower energy costs while minimizing impact to performance by automatically putting processor and memory into the lowest available power state

read complete story here: http://itsek.blogspot.com/2009/04/intels-new-xeon-5500-series-nehalem.html