Intel Core i7 12700KF 's Advantages
Released 2 years and 9 months late
Higher specification of memory (DDR5-4800 vs DDR4-2666)
Larger memory bandwidth (76.8GB/s vs 41.6GB/s)
Newer PCIe version (5.0 vs 3.0)
Higher base frequency (3.6GHz vs 2.9GHz)
Larger L3 cache size (25MB vs 9MB)
More modern manufacturing process (10nm vs 14nm)
Intel Core i5 9400F 's Advantages
Lower TDP (65W vs 125W)