Opteron 6276 's Advantages
Higher base frequency (2.3GHz vs 2.1GHz)
Lower TDP (115W vs 390W)
AMD EPYC 9845 's Advantages
Released 12 years and 11 months late
Higher specification of memory (6000 vs 3)
Newer PCIe version (5 vs 2)
Larger L3 cache size (320MB vs 8MB)
More modern manufacturing process (3nm vs 32nm)