Intel Xeon E5 1680 v3 's Advantages
Higher specification of memory (2133 vs 1866)
Higher base frequency (3.2GHz vs 2.9GHz)
Larger L3 cache size (20MB vs 6MB)
Intel Xeon E3 1284L v4 's Advantages
Released 9 months late
More modern manufacturing process (14nm vs 22nm)
Lower TDP (47W vs 140W)