Intel Xeon E5 1620 v2 's Advantages
Higher base frequency (3.7GHz vs 2.4GHz)
Lower TDP (130W vs 500W)
Xeon 6972P 's Advantages
Released 11 years late
Higher specification of memory (8800 vs 1866)
Newer PCIe version (5 vs 3)
Larger L3 cache size (480MB vs 10MB)
More modern manufacturing process (5nm vs 22nm)