Intel Xeon E3 1220 v2 's Advantages
Released 2 years and 8 months late
Newer PCIe version (3 vs 2)
Higher base frequency (3.1GHz vs 2.933GHz)
More modern manufacturing process (22nm vs 45nm)
Lower TDP (69W vs 95W)
Xeon X3470 's Advantages
Higher specification of memory (1333 vs 3)