Intel Core i3 8100 's Advantages
Integrated graphics card
Higher base frequency (3.6GHz vs 3.3GHz)
Lower TDP (65W vs 140W)
Intel Core i9 7900X 's Advantages
Higher specification of memory (2666 vs 2400)
Larger memory bandwidth (79.47GB/s vs 37.5GB/s)
Larger L3 cache size (14MB vs 6MB)