Opteron 2220 's Advantages
Higher base frequency (2.8GHz vs 2.5GHz)
Intel Xeon E5 2628 v3 's Advantages
Released 7 years and 7 months late
Higher specification of memory (2133 vs 2)
Newer PCIe version (3 vs 1)
More modern manufacturing process (22nm vs 90nm)
Lower TDP (85W vs 95W)