Intel Xeon E7 4820 v3 's Advantages
Larger L3 cache size (25MB vs 8MB)
Intel Xeon E3 1585 v5 's Advantages
Released 11 months late
Higher specification of memory (2133 vs 1866)
Higher base frequency (3.5GHz vs 1.9GHz)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (65W vs 115W)