Intel Xeon X5687 's Advantages
Larger L3 cache size (12MB vs 8MB)
Intel Xeon E3 1275 v5 's Advantages
Released 4 years and 8 months late
Higher specification of memory (DDR3 vs DDR3)
Newer PCIe version (3 vs 2)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (80W vs 130W)