Intel Core i5 7600K 's Advantages
Integrated graphics card
Higher base frequency (3.8GHz vs 3.3GHz)
Lower TDP (91W vs 140W)
Intel Core i9 7900X 's Advantages
Higher specification of memory (DDR4-2666 vs DDR4-2400)
Larger memory bandwidth (79.47GB/s vs 35.76GB/s)
Larger L3 cache size (14MB vs 6MB)