Intel Xeon X5687 's Advantages
Higher base frequency (3.6GHz vs 3.3GHz)
Larger L3 cache size (12MB vs 8MB)
Intel Xeon E3 1226 v3 's Advantages
Released 3 years and 3 months late
Higher specification of memory (DDR3-1600 vs DDR3)
Newer PCIe version (3 vs 2)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (84W vs 130W)