Opteron 8220 's Advantages
Higher specification of memory (667 vs 3)
Lower TDP (95W vs 130W)
Intel Xeon E5 1620 's Advantages
Released 5 years and 1 months late
Newer PCIe version (3 vs 1)
Higher base frequency (3.6GHz vs 2.8GHz)
More modern manufacturing process (32nm vs 90nm)