Intel Core i5 7640X 's Advantages
Higher specification of memory (2666 vs 2400)
Larger memory bandwidth (42.7GB/s vs 37.5GB/s)
Higher base frequency (4.0GHz vs 3.7GHz)
Intel Core i3 8300 's Advantages
Released 11 months late
Integrated graphics card
Larger L3 cache size (8MB vs 6MB)
Lower TDP (62W vs 112W)