Intel Xeon E5 2640 's Advantages
Higher base frequency (2.5GHz vs 2.4GHz)
Larger L3 cache size (15MB vs 10MB)
Xeon D 1715TER 's Advantages
Released 9 years and 11 months late
Higher specification of memory (2667 vs 3)
Newer PCIe version (4 vs 3)
More modern manufacturing process (10nm vs 32nm)
Lower TDP (50W vs 95W)