Intel Xeon E5 2620 v3 's Advantages
Released 4 years and 7 months late
Higher specification of memory (1866 vs 1333)
Newer PCIe version (3 vs 2)
Higher base frequency (2.4GHz vs 2.266GHz)
Larger L3 cache size (15MB vs 4MB)
More modern manufacturing process (22nm vs 45nm)
Xeon EC5539 's Advantages
Lower TDP (65W vs 85W)