Intel Xeon E7 8870 's Advantages
Higher base frequency (2.4GHz vs 2.1GHz)
Lower TDP (130W vs 500W)
Xeon 6979P 's Advantages
Released 13 years and 5 months late
Higher specification of memory (8800 vs 3)
Larger L3 cache size (504MB vs 30MB)
More modern manufacturing process (5nm vs 32nm)