Intel Core i5 12400 's Advantages
Released 2 years late
Integrated graphics card
Higher specification of memory (4800 vs 3200)
Newer PCIe version (5.0 vs 4.0)
Lower TDP (65W vs 280W)
AMD Ryzen Threadripper 3990X 's Advantages
Larger memory bandwidth (95.37GB/s vs 76.8GB/s)
Higher base frequency (2.9GHz vs 2.5GHz)
Larger L3 cache size (128MB vs 18MB)
More modern manufacturing process (7nm vs 10nm)