Intel Xeon E5 1681 v3 's Advantages
Larger L3 cache size (25MB vs 8MB)
Intel Xeon E3 1585 v5 's Advantages
Released 1 years and 8 months late
Higher specification of memory (2133 vs 2133)
Higher base frequency (3.5GHz vs 2.9GHz)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (65W vs 135W)