Intel Xeon E5 2640 's Advantages
Higher base frequency (2.5GHz vs 2.4GHz)
Intel Xeon E5 2622 v3 's Advantages
Released 2 years and 6 months late
Higher specification of memory (1866 vs 3)
Larger L3 cache size (20MB vs 15MB)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (85W vs 95W)