AMD EPYC 9455P 's Advantages
Released 14 years and 8 months late
Higher specification of memory (6000 vs 1333)
Newer PCIe version (5 vs 2)
Higher base frequency (3.15GHz vs 2.266GHz)
Larger L3 cache size (192MB vs 4MB)
More modern manufacturing process (4nm vs 45nm)
Xeon EC5539 's Advantages
Lower TDP (65W vs 300W)