Intel Core i7 7740X 's Advantages
Higher specification of memory (2666 vs 2400)
Larger memory bandwidth (42.7GB/s vs 37.5GB/s)
Higher base frequency (4.3GHz vs 3.7GHz)
Intel Core i3 8300 's Advantages
Released 11 months late
Integrated graphics card
Lower TDP (62W vs 112W)