Intel Core i5 12400 's Advantages
Released 5 years late
Higher specification of memory (DDR5-4800 vs DDR4-2400)
Larger memory bandwidth (76.8GB/s vs 35.76GB/s)
Newer PCIe version (5.0 vs 3.0)
Larger L3 cache size (18MB vs 8MB)
More modern manufacturing process (10nm vs 14nm)
Lower TDP (65W vs 91W)
Intel Core i7 7700K 's Advantages
Better graphics card performance
Higher base frequency (4.2GHz vs 2.5GHz)