Intel Xeon E3 1284L v4 's Advantages
Released 5 years and 3 months late
Higher specification of memory (1866 vs 3)
Newer PCIe version (3 vs 2)
Higher base frequency (2.9GHz vs 2.266GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (47W vs 60W)
Intel Xeon L5640 's Advantages
Larger L3 cache size (12MB vs 6MB)