Intel Xeon E7 4820 v3 's Advantages
Released 2 years and 6 months late
Higher specification of memory (1866 vs 3)
Larger L3 cache size (25MB vs 8MB)
More modern manufacturing process (22nm vs 32nm)
Opteron 4340 's Advantages
Higher base frequency (3.5GHz vs 1.9GHz)
Lower TDP (95W vs 115W)