AMD EPYC 7251 's Advantages
Released 4 years and 6 months late
Higher specification of memory (2400 vs 3)
Newer PCIe version (3 vs 2)
Higher base frequency (2.1GHz vs 1.9GHz)
Larger L3 cache size (32MB vs 8MB)
More modern manufacturing process (14nm vs 32nm)
Opteron 3320 EE 's Advantages
Lower TDP (25W vs 120W)