Intel Xeon E7 4820 v3 's Advantages
Released 3 years and 3 months late
Larger L3 cache size (25MB vs 20MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon E5 2670 's Advantages
Higher specification of memory (DDR3 vs DDR3)
Higher base frequency (2.6GHz vs 1.9GHz)