Xeon D 2799 's Advantages
Released 9 years and 11 months late
Higher specification of memory (3200 vs 1600)
Newer PCIe version (4 vs 3)
Larger L3 cache size (30MB vs 20MB)
More modern manufacturing process (10nm vs 32nm)
Intel Xeon E5 2689 's Advantages
Higher base frequency (2.6GHz vs 2.4GHz)
Lower TDP (115W vs 129W)