Opteron 6276 's Advantages
Released 1 years and 8 months late
Higher base frequency (2.3GHz vs 1.733GHz)
More modern manufacturing process (32nm vs 45nm)
Xeon E6510 's Advantages
Higher specification of memory (1333 vs 3)
Larger L3 cache size (12MB vs 8MB)
Lower TDP (105W vs 115W)