iXBT Labs posted a review on the Intel Xeon X5680 Processor

The transition to the 32nm process technology let Intel painlessly increase the number of cores. The updated Xeon 5600 series is either better or at least not worse than the Xeon 5500 one. The performance of dual-socket machines has been elevated to a new level, which is great. What's even better, the transition to new dice can solve another problem, i.e. reduce power consumption.

Intel Xeon X5680 Processor Review