Intel Core i5 12400 's Advantages
Released 3 years and 3 months late
Integrated graphics card
Higher specification of memory (DDR5-4800 vs DDR4-2666)
Newer PCIe version (5.0 vs 3.0)
Larger L3 cache size (18MB vs 17MB)
More modern manufacturing process (10nm vs 14nm)
Lower TDP (65W vs 165W)
Intel Core i7 9800X 's Advantages
Larger memory bandwidth (79.47GB/s vs 76.8GB/s)
Higher base frequency (3.8GHz vs 2.5GHz)