Opteron 8220 's Advantages
Higher specification of memory (667 vs 3)
Higher base frequency (2.8GHz vs 2.7GHz)
Lower TDP (95W vs 130W)
Intel Xeon E5 2680 's Advantages
Released 5 years and 1 months late
Newer PCIe version (3 vs 1)
More modern manufacturing process (32nm vs 90nm)