Xeon W 1390 's Advantages
Released 12 years and 8 months late
Higher specification of memory (3200 vs 3)
Newer PCIe version (4 vs 2)
More modern manufacturing process (14nm vs 45nm)
Lower TDP (80W vs 150W)
Intel Xeon X5492 's Advantages
Higher base frequency (3.4GHz vs 2.8GHz)