In continuing to do research on this two monitors that would appear to work in the three monitor configuration due to having DP out ports are:
Dell U2417H and Viewsonic VP2468.
Can anyone comment on whether these monitors would work in a three monitor config with an i7-8700 (K or non K) with an Asus Prime Z370-A motherboard connected via DP from mobo to monitor 1 and then daisy chaining from monitor one to monitor two and monitor two to monitor three.
This message was posted on behalf of Intel Corporation
I understand that you are considering to connect 3 monitors to the system with the motherboard specified above.
Regarding that, it will be possible to connect the monitors to the 3 outputs there, HDMI, DVI and Display Port. This configuration will allow you to change the resolutions according to what you would like. Also, the daisy chain is possible, nevertheless, it will not allow you go over 1920x1080 @60Hz.
So in other words, if you want to customize the different resolutions then the best option is to use each one of the video outputs showing on the image you provided.
Hope this helps.
For anyone in the future who needs this - I did get three monitors working properly. My monitors are Viewsonic VP2468s which have DP out and I am using daisy-chaining. I have monitor 1 connected to my motherboard's DP output with a DP to mini-DP cable. I then connect DP out on monitor 1 to mini DP on monitor 2 and DP out on monitor 2 to monitor 3. I had to update the Firmware on my monitors and turn on DP 1.2 and MST on all monitors.