Intel Xeon E3 1225 's Advantages
Higher base frequency (3.1GHz vs 2.1GHz)
Intel Xeon E5 2620 v2 's Advantages
Released 2 years and 5 months late
Larger L3 cache size (15MB vs 6MB)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (80W vs 95W)