Multiple screens of different dpi show blurry text (really bad)

[roybjjj]

my setup:
win10 with 3 monitors: 4k 27" monitor and two 24" 1920x1080 monitors.
windows suggested 150% dpi for the 4k and 100% for the others.
4k looks great but the 24" (with 100% dpi!) looks terrible. The text is all blurry.
I saw many similar issues (saw this: http://www.tenforums.com/general-discussion/7423-blurry-text-4.html)
and tried the registry changes, but all fixes (including the utility that is out there) set all monitors to the same DPI.
I can't do 100% in the 4k, it's too small, and I must do 100% in the small screens, otherwise it's too big.
Got latest drivers for my GeForce GTX 970 and monitors (vendors drivers for all monitors).

I attached an example for when the 4k is d/c (top) and when it is connected (bottom) from the 24" monitor. it is not really text but is shows how terrible it is, I simply can't read for more than a few minutes.

I really don't want to let go of my 4k, but it is impossible to use the other ones.
Please help.

Thanks,
Roy

 

[Trouble]

Hello and welcome to the forum.
Try going into your nVidia control panel, expand "Display", select "Adjust desktop color settings"
Go down to "Digital vibrance:" make sure you are working with the problem monitor(s) by selecting them in -> "1. Select the display you would like to change."
Slide the Digital vibrance slider over to 75% and see if that helps with the issue(s) you're experiencing

 

[roybjjj]

Unfortunately no, it only changed the colors. the blurriness stayed the same.
I

 

[roybjjj]

Interesting update,
The monitor I set to be the main monitor is always totally clear. when I set my 24" to be the main, the 27" was blurry.
It's a shame having a blurry 4k monitor.
why is that?
any ideas what I can try next?