Opteron 2222 SE 's Advantages
Higher base frequency (3GHz vs 2.533GHz)
Xeon X3440 's Advantages
Released 2 years and 5 months late
Higher specification of memory (1333 vs 2)
Newer PCIe version (2 vs 1)
More modern manufacturing process (45nm vs 90nm)
Lower TDP (95W vs 119W)