Opteron 8347 HE (B3) 's Advantages
Lower TDP (68W vs 95W)
Xeon X3450 's Advantages
Released 1 years and 4 months late
Higher specification of memory (1333 vs 667)
Higher base frequency (2.667GHz vs 1.9GHz)
Larger L3 cache size (8MB vs 2MB)
More modern manufacturing process (45nm vs 65nm)