Xeon W 1390P 's Advantages
Released 12 years and 2 months late
Higher specification of memory (3200 vs 1066)
Newer PCIe version (4 vs 2)
Higher base frequency (3.5GHz vs 2.533GHz)
Larger L3 cache size (16MB vs 8MB)
More modern manufacturing process (14nm vs 45nm)
Xeon E5540 's Advantages
Lower TDP (80W vs 125W)