Intel Xeon E5 2665 's Advantages
Released 5 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 (115W vs 119W)
Opteron 2220 SE (F3) 's Advantages
Higher base frequency (2.8GHz vs 2.4GHz)