Intel Xeon E3 1220 v3 's Advantages
Released 7 months late
Newer PCIe version (3 vs 2)
Higher base frequency (3.1GHz vs 2.8GHz)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (80W vs 115W)
Opteron 6320 's Advantages
Higher specification of memory (1866 vs 1600)