Intel Xeon E5 1620 v2 's Advantages
Released 1 years and 6 months late
Higher specification of memory (1866 vs 3)
Higher base frequency (3.7GHz vs 3GHz)
Larger L3 cache size (10MB vs 5MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon E5 2637 's Advantages
Lower TDP (80W vs 130W)