Xeon 6979P 's Advantages
Released 12 years and 4 months late
Higher specification of memory (8800 vs 3)
Higher base frequency (2.1GHz vs 1.8GHz)
Larger L3 cache size (504MB vs 10MB)
More modern manufacturing process (5nm vs 32nm)
Intel Xeon E5 2403 's Advantages
Lower TDP (80W vs 500W)