What components for i7 8700(non k)?
And what ram should I go with 2666mhz or 3200mhz. What motherboard z370 or z390 or something else? I am going with 144mhz monitor and going together rtx 2060. Plz help
Check out this page for a comparison between the two chipsets - https://www.pugetsystems.com/labs/articles/Intel-Z370-vs-Z390-Chipset-Comparison-1231/
Which you want will depend on whether you will utilise the difference.
Here is a good read on understanding RAM speeds - https://www.pcsteps.com/7932-real-ram-speed-mhz-cas-latency/