Intel Xeon W 2140B 's Advantages
Released 7 years and 9 months late
Higher specification of memory (2666 vs 1333)
Newer PCIe version (3 vs 2)
Higher base frequency (3.2GHz vs 2GHz)
More modern manufacturing process (14nm vs 45nm)
Xeon E7540 's Advantages
Larger L3 cache size (18MB vs 11MB)
Lower TDP (105W vs 120W)