Xeon D 1715TER 's Advantages
Released 11 years late
Higher specification of memory (2667 vs 1333)
Newer PCIe version (4 vs 2)
Higher base frequency (2.4GHz vs 2.133GHz)
More modern manufacturing process (10nm vs 32nm)
Lower TDP (50W vs 60W)
Xeon L5639 's Advantages
Larger L3 cache size (12MB vs 10MB)