Intel Xeon E5 2620 v3 's Advantages
Released 4 years and 6 months late
Higher specification of memory (1866 vs 3)
Newer PCIe version (3 vs 2)
Larger L3 cache size (15MB vs 12MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon E5620 's Advantages
Lower TDP (80W vs 85W)