Xeon L5639 's Advantages
Lower TDP (60W vs 129W)
Xeon D 2799 's Advantages
Released 11 years late
Higher specification of memory (3200 vs 1333)
Newer PCIe version (4 vs 2)
Higher base frequency (2.4GHz vs 2.133GHz)
Larger L3 cache size (30MB vs 12MB)
More modern manufacturing process (10nm vs 32nm)