Intel Xeon E5503 's Advantages
Released 3 years and 7 months late
Higher specification of memory (3 vs 2)
Newer PCIe version (2 vs 1)
More modern manufacturing process (45nm vs 90nm)
Lower TDP (80W vs 119W)
Opteron 2220 SE (F3) 's Advantages
Higher base frequency (2.8GHz vs 2GHz)