Opteron 13KS EE 's Advantages
Higher specification of memory (1333 vs 3)
Larger L3 cache size (6MB vs 3MB)
Intel Xeon E3 1220L 's Advantages
Released 2 years late
Newer PCIe version (3 vs 2)
Higher base frequency (2.2GHz vs 2GHz)
More modern manufacturing process (32nm vs 45nm)
Lower TDP (20W vs 50W)