Opteron 13KS EE 's Advantages
Higher specification of memory (1333 vs 3)
Lower TDP (50W vs 130W)
Intel Xeon X5687 's Advantages
Released 1 years and 10 months late
Higher base frequency (3.6GHz vs 2GHz)
Larger L3 cache size (12MB vs 6MB)
More modern manufacturing process (32nm vs 45nm)