Opteron 6276 's Advantages
Lower TDP (115W vs 180W)
AMD EPYC 7413 's Advantages
Released 9 years and 4 months late
Higher specification of memory (DDR4-3200 vs DDR3)
Newer PCIe version (4 vs 2)
Higher base frequency (2.65GHz vs 2.3GHz)
Larger L3 cache size (128MB vs 8MB)
More modern manufacturing process (7nm vs 32nm)