Opteron 8222 's Advantages
Higher specification of memory (667 vs 3)
Higher base frequency (3GHz vs 1.6GHz)
Intel Xeon E5603 's Advantages
Released 3 years and 6 months late
Newer PCIe version (2 vs 1)
More modern manufacturing process (32nm vs 90nm)
Lower TDP (80W vs 95W)