Intel Xeon E3 1275 v2 's Advantages
Newer PCIe version (3 vs 2)
Higher base frequency (3.5GHz vs 2.2GHz)
More modern manufacturing process (22nm vs 32nm)
Opteron 4310 EE 's Advantages
Released 7 months late
Higher specification of memory (1600 vs 3)
Lower TDP (35W vs 77W)