Intel Xeon E5 2678 v3 's Advantages
Released 3 years and 11 months late
Higher specification of memory (2133 vs 3)
Newer PCIe version (3 vs 2)
Larger L3 cache size (30MB vs 12MB)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (120W vs 130W)
Intel Xeon X5647 's Advantages
Higher base frequency (2.933GHz vs 2.5GHz)