AMD EPYC 7643P 's Advantages
Released 5 years and 3 months late
Higher specification of memory (3200 vs 2666)
Newer PCIe version (4 vs 3)
Larger L3 cache size (256MB vs 32MB)
More modern manufacturing process (7nm vs 14nm)
AMD EPYC 7261 's Advantages
Higher base frequency (2.5GHz vs 2.3GHz)
Lower TDP (170W vs 225W)