Opteron 8220 's Advantages
Higher base frequency (2.8GHz vs 2.5GHz)
Lower TDP (95W vs 135W)
Intel Xeon E5 1691 v3 's Advantages
Released 7 years and 7 months late
Higher specification of memory (2133 vs 667)
Newer PCIe version (3 vs 1)
More modern manufacturing process (22nm vs 90nm)