Intel Xeon E5 1620 v3 's Advantages
Higher specification of memory (2133 vs 4)
Higher base frequency (3.5GHz vs 1.7GHz)
Larger L3 cache size (10MB vs 1.5MB)
Intel Xeon D 1587 's Advantages
Released 1 years and 5 months late
More modern manufacturing process (14nm vs 22nm)
Lower TDP (65W vs 140W)