AMD EPYC 7642 's Advantages
Released 2 years and 2 months late
Higher specification of memory (3200 vs 2666)
Newer PCIe version (4 vs 3)
Higher base frequency (2.4GHz vs 2GHz)
Larger L3 cache size (256MB vs 64MB)
More modern manufacturing process (7nm vs 14nm)
AMD EPYC 7551P 's Advantages
Lower TDP (180W vs 225W)