Xeon 6980P 's Advantages
Released 10 years late
Higher specification of memory (8800 vs 2133)
Newer PCIe version (5 vs 3)
Larger L3 cache size (504MB vs 20MB)
More modern manufacturing process (5nm vs 22nm)
Intel Xeon E5 1660 v3 's Advantages
Higher base frequency (3GHz vs 2GHz)
Lower TDP (140W vs 500W)