Intel Xeon X5492 's Advantages
Higher base frequency (3.4GHz vs 3GHz)
Intel Xeon E3 1575M v5 's Advantages
Released 7 years and 4 months late
Higher specification of memory (DDR3 vs DDR2)
Newer PCIe version (3 vs 2)
More modern manufacturing process (14nm vs 45nm)
Lower TDP (45W vs 150W)