Intel Xeon E5 4620 v3 's Advantages
Higher specification of memory (DDR4-1866 vs DDR3)
Higher base frequency (2GHz vs 1.7GHz)
Larger L3 cache size (25MB vs 1.5MB)
Intel Xeon D 1587 's Advantages
Released 8 months late
More modern manufacturing process (14nm vs 22nm)
Lower TDP (65W vs 105W)