Intel Xeon X5687 's Advantages
Released 1 years late
Higher base frequency (3.6GHz vs 2.266GHz)
Larger L3 cache size (12MB vs 4MB)
More modern manufacturing process (32nm vs 45nm)
Xeon EC5539 's Advantages
Higher specification of memory (1333 vs 3)
Lower TDP (65W vs 130W)