Xeon w3 2525 's Advantages
Released 15 years and 5 months late
Higher specification of memory (4400 vs 1066)
Newer PCIe version (5 vs 2)
Higher base frequency (3.5GHz vs 2.533GHz)
Larger L3 cache size (22.5MB vs 8MB)
More modern manufacturing process (10nm vs 45nm)
Xeon E5540 's Advantages
Lower TDP (80W vs 175W)