Opteron 8222 SE 's Advantages
Higher base frequency (3GHz vs 2GHz)
Xeon E6540 's Advantages
Released 2 years and 11 months late
Higher specification of memory (1333 vs 667)
Newer PCIe version (2 vs 1)
More modern manufacturing process (45nm vs 90nm)
Lower TDP (105W vs 120W)