Opteron 8220 's Advantages
Higher base frequency (2.8GHz vs 2.6GHz)
Lower TDP (95W vs 115W)
Intel Xeon E5 2689 's Advantages
Released 5 years and 1 months late
Higher specification of memory (1600 vs 667)
Newer PCIe version (3 vs 1)
More modern manufacturing process (32nm vs 90nm)