Intel Xeon E3 1220 v2 's Advantages
Released 2 years and 11 months late
Newer PCIe version (3 vs 2)
Higher base frequency (3.1GHz vs 2.5GHz)
Larger L3 cache size (8MB vs 6MB)
More modern manufacturing process (22nm vs 45nm)
Lower TDP (69W vs 115W)
Opteron 1381 's Advantages
Higher specification of memory (1333 vs 3)