Opteron 8220 SE (F2) 's Advantages
Higher specification of memory (667 vs 3)
Higher base frequency (2.8GHz vs 2GHz)
Intel Xeon E5503 's Advantages
Released 3 years and 7 months late
Newer PCIe version (2 vs 1)
More modern manufacturing process (45nm vs 90nm)
Lower TDP (80W vs 120W)