Opteron 2222 's Advantages
Higher base frequency (3GHz vs 1.8GHz)
Intel Xeon E5 2603 's Advantages
Released 4 years and 7 months late
Higher specification of memory (3 vs 2)
Newer PCIe version (3 vs 1)
More modern manufacturing process (32nm vs 90nm)
Lower TDP (80W vs 95W)