Intel Xeon E5 2640 v2 's Advantages
Released 4 years late
Newer PCIe version (3 vs 2)
Larger L3 cache size (20MB vs 8MB)
More modern manufacturing process (22nm vs 45nm)
Xeon X3470 's Advantages
Higher specification of memory (1333 vs 3)
Higher base frequency (2.933GHz vs 2GHz)