Opteron 6276 's Advantages
Higher base frequency (2.3GHz vs 1.8GHz)
Intel Xeon E5 2675 v3 's Advantages
Released 2 years and 10 months late
Higher specification of memory (2133 vs 3)
Newer PCIe version (3 vs 2)
Larger L3 cache size (40MB vs 8MB)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (110W vs 115W)