Intel Xeon E3 1275 's Advantages
Released 4 years late
Newer PCIe version (3 vs 1)
Higher base frequency (3.4GHz vs 3GHz)
More modern manufacturing process (32nm vs 90nm)
Lower TDP (95W vs 120W)
Opteron 8222 SE 's Advantages
Higher specification of memory (667 vs 3)