Opteron 3320 EE 's Advantages
Lower TDP (25W vs 225W)
AMD EPYC 7643 's Advantages
Released 8 years and 3 months late
Higher specification of memory (DDR4-3200 vs DDR3)
Newer PCIe version (4 vs 2)
Higher base frequency (2.3GHz vs 1.9GHz)
Larger L3 cache size (256MB vs 8MB)
More modern manufacturing process (7nm vs 32nm)