Here are the specs for your motherboard:
Built for creators, the ProArt Z790-Creator WiFi features 16+1 power stages (70A), PCIe® 5.0, DDR5 support, Thunderbolt⢠4, 10 Gb & 2.5 Gb LAN, WiFi 6E and four PCIe 4.0 M.2
www.asus.com
13900KS is supported at bios level 0704 which was released 11/2022
The specs also say 192gb is supported but none show up on the ram QVL list.
That is not surprising since QVL lists are not updated frequently.
To be certain of support go to g.skil, Corsair or... and verify that the 192gb kit is supported on your motherboard.
You may find support up to 7200 speeds.
Effectiveness of ram is not totally determined by speed, but also by timings so a lesser speed and better timings may be equally effective.
I like the KS for a top end build. It is a better binned chip that should perform better at a given power level than the K version.
Plan on a top quality psu for your components.
Look for a unit in the 1200w + range. A psu only will draw the power demanded of it, regardless of the max capability.
Seasonic focus/prime or corsair RMx will come with 10 year warranties or better.
While some might worry about ultra liquid cooling, temper your expectations.
Here is an interesting article on running a 13900K with less than top cooling:
The Core i9-13900K can push even the most capable liquid coolers to their limits, but you don’t lose that much performance if you go with budget-priced air cooling.
www.tomshardware.com
Plan on a case with good front intake airflow.
Your graphics cards and motherboard need good airflow.
Some will come with two 160/200mm fans.