AMD EPYC 7742 's Advantages
Released 10 years and 5 months late
Higher specification of memory (3200 vs 1066)
Newer PCIe version (4 vs 2)
Larger L3 cache size (256MB vs 8MB)
More modern manufacturing process (7nm vs 45nm)
Xeon E5540 's Advantages
Higher base frequency (2.533GHz vs 2.25GHz)
Lower TDP (80W vs 225W)