Opteron 8224 SE 's Advantages
Higher base frequency (3.2GHz vs 1.8GHz)
Lower TDP (120W vs 225W)
Xeon 6756E 's Advantages
Released 16 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)