Opteron 1352 (B2) 's Advantages
Higher base frequency (2.1GHz vs 1.9GHz)
Lower TDP (95W vs 115W)
Intel Xeon E7 4820 v3 's Advantages
Released 7 years late
Higher specification of memory (1866 vs 800)
Newer PCIe version (3 vs 2)
Larger L3 cache size (25MB vs 2MB)
More modern manufacturing process (22nm vs 65nm)