Xeon EC5539 's Advantages
Higher specification of memory (1333 vs 3)
Higher base frequency (2.266GHz vs 2.2GHz)
Lower TDP (65W vs 115W)
Opteron 6274 's Advantages
Released 1 years and 9 months late
Larger L3 cache size (16MB vs 4MB)
More modern manufacturing process (32nm vs 45nm)