Opteron 8220 SE (F3) 's Advantages
Higher base frequency (2.8GHz vs 1.8GHz)
Lower TDP (120W vs 225W)
Xeon 6756E 's Advantages
Released 17 years and 10 months late
Higher specification of memory (6400 vs 667)
Newer PCIe version (5 vs 1)
More modern manufacturing process (5nm vs 90nm)