Intel Xeon E5 2640 v3 's Advantages
Larger L3 cache size (20MB vs 12MB)
Xeon E 2186M 's Advantages
Released 3 years and 7 months late
Higher specification of memory (DDR4-2666 vs DDR4-1866)
Higher base frequency (2.9GHz vs 2.6GHz)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (45W vs 90W)