Intel Core i5 12400 Advantages
Released 2 years and 3 months late
Higher specification of memory (4800 vs 2666)
Larger memory bandwidth (76.8GB/s vs 41.6GB/s)
Newer PCIe version (5.0 vs 3.0)
Larger L3 cache size (18MB vs 16MB)
More modern manufacturing process (10nm vs 14nm)
Lower TDP (65W vs 127W)
Intel Core i9 9900KS Advantages
Better graphics card performance
Higher base frequency (4.0GHz vs 2.5GHz)