Intel Xeon E5 2640 v3 's Advantages
Lower TDP (90W vs 200W)
Intel Xeon w5 2455X 's Advantages
Released 8 years and 5 months late
Higher specification of memory (DDR5-4800 vs DDR4-1866)
Newer PCIe version (5 vs 3)
Higher base frequency (3.2GHz vs 2.6GHz)
Larger L3 cache size (30MB vs 20MB)
More modern manufacturing process (10nm vs 22nm)