Intel Xeon E5 4640 v3 's Advantages
Released 1 years and 9 months late
Higher specification of memory (DDR4-1866 vs DDR3)
Larger L3 cache size (30MB vs 20MB)
Intel Xeon E5 2640 v2 's Advantages
Higher base frequency (2GHz vs 1.9GHz)
Lower TDP (95W vs 105W)