Intel Xeon D 1531 's Advantages
Higher base frequency (2.2GHz vs 2GHz)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (35W vs 105W)
Intel Xeon E5 4620 v3 's Advantages
Higher specification of memory (DDR4-1866 vs DDR3)
Larger L3 cache size (25MB vs 1.5MB)