Intel Xeon E7 4820 v3 's Advantages
Larger L3 cache size (25MB vs 6MB)
Intel Xeon E3 1284L v4 's Advantages
Higher specification of memory (DDR3-1866 vs DDR3)
Higher base frequency (2.9GHz vs 1.9GHz)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (47W vs 115W)