AMD EPYC 9454 's Advantages
Released 4 years and 4 months late
Higher specification of memory (DDR5-4800 vs DDR4-2666)
Newer PCIe version (5 vs 3)
Larger L3 cache size (256MB vs 12MB)
Xeon E 2126G 's Advantages
Higher base frequency (3.3GHz vs 2.75GHz)
Lower TDP (80W vs 290W)