I build myself about a year ago a PC with I7-8700K and 16GB of RAM on a Gigabyte Z370 mother board and it works very well in compare with what I had before, a Dell Precision T5500 with Xeon X5690 processor and 24GB RAM. An I7-9700k or I9-9900k will do even better. Have a look at doctor mix blog for the I9.