Intel Xeon E5 2620 v2 's Advantages
Lower TDP (80W vs 500W)
Xeon 6979P 's Advantages
Released 11 years late
Higher specification of memory (8800 vs 3)
Newer PCIe version (5 vs 3)
Larger L3 cache size (504MB vs 15MB)
More modern manufacturing process (5nm vs 22nm)