Opteron 6308 's Advantages
Released 8 months late
Higher specification of memory (1866 vs 3)
Higher base frequency (3.5GHz vs 3.1GHz)
Lower TDP (115W vs 150W)
Intel Xeon E5 2687W 's Advantages
Newer PCIe version (3 vs 2)
Larger L3 cache size (20MB vs 8MB)