Hi Chris
I am having the same issue
I have had this monitor for years. I used to use it with a Mac desktop with no issue. I now have a new PC and when I plug the DVI in I can't put it at it's max resolution 2560x1440 without text becoming blurry.
The graphics card I have is the NVIDA GeForce GTX 750 Ti
All drivers have been updated including the monitor's driver.
Can you offer a solution?