Intel Xeon X5492 's Advantages
Higher base frequency (3.4GHz vs 2.6GHz)
Intel Xeon E5 2640 v3 's Advantages
Released 6 years late
Higher specification of memory (DDR4-1866 vs DDR2)
Newer PCIe version (3 vs 2)
More modern manufacturing process (22nm vs 45nm)
Lower TDP (90W vs 150W)