The Tech Report posted a review on Intel's Xeon W5580 Processors
A quote from the article:
>> Intel's Xeon W5580 Processors Review
Intel's Nehalem-based Xeons are finally here, and they've left us gasping for air. This may well be the largest performance jump from one CPU generation to the next that we've ever seen. Idle power draw is way, way down, as well. The downside? We're still looking for one.
>> Intel's Xeon W5580 Processors Review