Opteron 8222 SE 's Advantages
Higher base frequency (3GHz vs 1.8GHz)
Lower TDP (120W vs 225W)
Xeon 6756E 's Advantages
Released 17 years and 2 months late
Higher specification of memory (6400 vs 667)
Newer PCIe version (5 vs 1)
More modern manufacturing process (5nm vs 90nm)