Xeon E7 2820 's Advantages
Larger L3 cache size (18MB vs 12MB)
Xeon E 2276G 's Advantages
Released 8 years and 1 months late
Higher specification of memory (2666 vs 1333)
Higher base frequency (3.8GHz vs 2GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (80W vs 105W)