Intel Xeon E5 4655 v3 's Advantages
Released 5 years and 3 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)
Intel Xeon W3680 's Advantages
Higher base frequency (3.333GHz vs 2.9GHz)
Lower TDP (130W vs 135W)