Opteron 8347 HE (B3) 's Advantages
Lower TDP (68W vs 130W)
Xeon E7 4870 's Advantages
Released 2 years and 11 months late
Higher specification of memory (1333 vs 667)
Higher base frequency (2.4GHz vs 1.9GHz)
Larger L3 cache size (30MB vs 2MB)
More modern manufacturing process (32nm vs 65nm)