Intel Xeon E5 1650 v3 's Advantages
Higher specification of memory (DDR4-2133 vs DDR3)
Higher base frequency (3.5GHz vs 1.8GHz)
Larger L3 cache size (15MB vs 1.5MB)
Intel Xeon D 1581 's Advantages
Released 1 years and 5 months late
More modern manufacturing process (14nm vs 22nm)
Lower TDP (65W vs 140W)