Intel Xeon E5 2420 's Advantages
Released 4 years late
Higher base frequency (1.9GHz vs 1.8GHz)
Larger L3 cache size (15MB vs 2MB)
More modern manufacturing process (32nm vs 65nm)
Opteron 8346 HE (B3) 's Advantages
Higher specification of memory (667 vs 3)
Lower TDP (68W vs 95W)