Does it still seem related to the Asus monitor?
I've never heard of a particular monitor causing problems like this before.
My monitor setup currently is:
Asus PG279q 1440p 165Hz Main monitor
Asus VG248 1080p 144Hz two side monitors
So, I have been testing some more. I have now tried with a GTX 970 and Radeon HD 5780. The same issue persist with the 970 and 1080, but when i had the Radeon HD 5780 installed the issue had lessened a lot (could be something regarding only getting 100Hz on my main monitor, 144Hz on one of the other and 75Hz on the last, because it only supports DP 1.1 and nothing higher).
Also tried to change my m.2 slot, to see if it was something there, but that did not help either.
I have also tried to set my refresh rate on my monitors to lower than 144hz and 165hz to see if it could make a difference, but it did not.
So i put a order on 3 new DP 1.4 cables and a new 1TB SSD 2.5"(need this for faster storage, not only for testing
) that i can try to install windows on to check if it could be something with my m.2(doubt it at this point tho). So if the new cables do not do anything to this issue, i want to blame the Nvidia driver, since the issue was severely lessened on the AMD card and drivers, even tho a little bit gimped. Hopefully the cable change will fix my issue, if not i guess i have to contact Nvidia about it.