Intel Xeon E3 1270 v3 's Advantages
Released 1 years and 3 months late
More modern manufacturing process (22nm vs 32nm)
Lower TDP (80W vs 130W)
Intel Xeon E5 1620 's Advantages
Higher specification of memory (DDR3 vs DDR3)
Higher base frequency (3.6GHz vs 3.5GHz)
Larger L3 cache size (10MB vs 8MB)