AMD EPYC 7451 's Advantages
Lower TDP (180W vs 360W)
AMD EPYC 9555P 's Advantages
Released 7 years and 4 months late
Higher specification of memory (6000 vs 2666)
Newer PCIe version (5 vs 3)
Higher base frequency (3.2GHz vs 2.3GHz)
Larger L3 cache size (256MB vs 64MB)
More modern manufacturing process (4nm vs 14nm)