Intel Xeon E5 2670 v2 's Advantages
Higher base frequency (2.5GHz vs 1.7GHz)
Larger L3 cache size (25MB vs 1.5MB)
Intel Xeon D 1587 's Advantages
Released 2 years and 5 months late
Higher specification of memory (DDR3 vs DDR3)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (65W vs 115W)