Intel Xeon D 1531 's Advantages
Higher base frequency (2.2GHz vs 2.1GHz)
Lower TDP (35W vs 500W)
Xeon 6979P 's Advantages
Released 8 years and 10 months late
Higher specification of memory (8800 vs 4)
Newer PCIe version (5 vs 3)
Larger L3 cache size (504MB vs 1.5MB)
More modern manufacturing process (5nm vs 14nm)