I bought a LG 25UM58-P few months ago and was using it with my laptop(Lenovo Y-500). I was getting constant 75hz and am still getting it via laptop. But when I connected it to my new PC few days ago I can't seem to get more than 60hz with HDMI.
My new build has 8700k, Asus Z370-E, no graphics card yet(should get it by the end of the week) and haven't activated windows 10(waiting the key). I tried installing drivers from LG's site but installation fails when try to install it.