Intel Core i5 9400 's Advantages
Released 1 years and 8 months late
Integrated graphics card
Larger L3 cache size (9MB vs 6MB)
Lower TDP (65W vs 112W)
Intel Core i5 7640X 's Advantages
Larger memory bandwidth (42.7GB/s vs 41.6GB/s)
Higher base frequency (4.0GHz vs 2.9GHz)