AMD EPYC 7643 's Advantages
Lower TDP (225W vs 400W)
AMD EPYC 9655P 's Advantages
Released 3 years and 7 months late
Higher specification of memory (6000 vs 3200)
Newer PCIe version (5 vs 4)
Higher base frequency (2.6GHz vs 2.3GHz)
Larger L3 cache size (384MB vs 256MB)
More modern manufacturing process (4nm vs 7nm)