NGENUITY SOFTWARE
The NGENUITY Beta can be install via the Microsoft Store and so once you launch it will detect compatible hardware.
In case it doesn't detect your RAM, you will need to go into the settings menu and enable memory support as seen above.
Once you do that you will be able to select the RAM and adjust its RGB effects (for some strange reason only the rainbow effect could be selected - perhaps due to the fact that the Z390 DARK doesn't support RGB?).
You can also adjust the speed and brightness levels of the effects.