Intel Xeon E5 2640 v2 's Advantages
Larger L3 cache size (20MB vs 11MB)
Lower TDP (95W vs 120W)
Intel Xeon W 2140B 's Advantages
Released 4 years and 3 months late
Higher specification of memory (2666 vs 3)
Higher base frequency (3.2GHz vs 2GHz)
More modern manufacturing process (14nm vs 22nm)