AMD EPYC 7742 's Advantages
Released 7 years and 5 months late
Higher specification of memory (DDR4-3200 vs DDR3)
Newer PCIe version (4 vs 3)
Larger L3 cache size (256MB vs 15MB)
Intel Xeon E5 2640 's Advantages
Higher base frequency (2.5GHz vs 2.25GHz)
Lower TDP (95W vs 225W)