Opteron 13KS EE 's Advantages
Lower TDP (50W vs 80W)
Intel Xeon E3 1220 v3 's Advantages
Released 4 years and 2 months late
Higher specification of memory (1600 vs 1333)
Newer PCIe version (3 vs 2)
Higher base frequency (3.1GHz vs 2GHz)
Larger L3 cache size (8MB vs 6MB)
More modern manufacturing process (22nm vs 45nm)