Intel Xeon E5 2687W 's Advantages
Released 2 years late
Newer PCIe version (3 vs 2)
Higher base frequency (3.1GHz vs 1.9GHz)
Larger L3 cache size (20MB vs 12MB)
More modern manufacturing process (32nm vs 45nm)
Opteron 6168 's Advantages
Lower TDP (115W vs 150W)