Custom Resolution Utility (CRU)

[Sersch]

Hi Guys,
I have a 4k Monitor that supports 60hz.
Since my Laptop has an older Hdmi port (i guess its hdmi 1.4b) i can only get 4k30fps.
Thats why i am working with 1440p resolution. Now i wanted to try to get more than 60FPS on that monitor. With CRU i could get 65 and 70hz to show up, but not 75 or even 80hz. I have read that with hdmi 1.4 it should be able to get me to 75 or 80hz. I know that it doesnt mean that my monitor supports it, but it wanted to at least try it out. It also could handle 1080p 75hz without problems. But in 1080p even in 60hz the colors looked way worse, so i wanted to stay at 1440p. Maybe i got wrong settings aswell. But i thought that i could at least try 75hz at 1440p out.
My Laptop is the "asus fx553ve".
I hope someone can tell me what i am doing wrong.
If i sounded rude or something, please appoligize me. I am german and my english is really bad.
I also tried 120hz on 1080p and 100hz on 1080p, but there my monitor said that it wont handle it. (I tried that out, because toastyx said in another question that it might work, but it didnt for me, which i didnt expect anyway but eventually this is an important information for you?)