Xeon E 2176M 's Advantages
Higher base frequency (2.7GHz vs 2.1GHz)
Lower TDP (45W vs 500W)
Xeon 6979P 's Advantages
Released 6 years and 5 months late
Higher specification of memory (8800 vs 2666)
Newer PCIe version (5 vs 3)
Larger L3 cache size (504MB vs 12MB)
More modern manufacturing process (5nm vs 14nm)