Opteron A1120 's Advantages
Released 4 years and 2 months late
Newer PCIe version (3 vs 2)
More modern manufacturing process (28nm vs 32nm)
Lower TDP (25W vs 115W)
Opteron 6276 's Advantages
Higher specification of memory (DDR3 vs DDR3)
Higher base frequency (2.3GHz vs 1.7GHz)