Intel Xeon E3 1220 v3 's Advantages
Higher base frequency (3.1GHz vs 2.1GHz)
Lower TDP (80W vs 500W)
Xeon 6979P 's Advantages
Released 11 years and 3 months late
Higher specification of memory (8800 vs 1600)
Newer PCIe version (5 vs 3)
Larger L3 cache size (504MB vs 8MB)
More modern manufacturing process (5nm vs 22nm)