Intel Xeon E7 4820 v3 's Advantages
Larger L3 cache size (25MB vs 8MB)
Intel Xeon E3 1545M v5 's Advantages
Released 7 months late
Higher specification of memory (2133 vs 1866)
Higher base frequency (2.9GHz vs 1.9GHz)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (45W vs 115W)