Opteron 2220 SE (F3) 's Advantages
Higher base frequency (2.8GHz vs 1.9GHz)
Lower TDP (119W vs 250W)
Xeon 6766E 's Advantages
Released 17 years and 10 months late
Higher specification of memory (6400 vs 2)
Newer PCIe version (5 vs 1)
More modern manufacturing process (5nm vs 90nm)