Intel Xeon E3 1220 v5 's Advantages
Released 1 years and 1 months late
Higher specification of memory (2133 vs 1866)
Higher base frequency (3GHz vs 2.8GHz)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (80W vs 140W)
Intel Xeon E5 1603 v3 's Advantages
Larger L3 cache size (10MB vs 8MB)