Opteron 8346 HE (B3) 's Advantages
Higher specification of memory (667 vs 3)
Lower TDP (68W vs 130W)
Intel Xeon W3670 's Advantages
Released 2 years and 3 months late
Higher base frequency (3.2GHz vs 1.8GHz)
Larger L3 cache size (12MB vs 2MB)
More modern manufacturing process (32nm vs 65nm)