Tom's Hardware Guide published a review on Intel Xeon E5-2600 v2: More Cores, Cache, And Better Efficiency A quote from the article:

Intel recently launched its Xeon E5-2600 v2 CPU, based on the Ivy Bridge-EP architecture. We got a couple of workstation-specific -2687W v2 processors with eight cores and 25 MB of L3 cache each, and are comparing them to previous-generation -2687Ws.

 Intel Xeon E5-2600 v2: More Cores, Cache, And Better Efficiency @ Toms Hardware