Question Nvidia Control panel resolution won't allow 144hz

dradu20

Honorable
Sep 16, 2017
78
1
10,535
I have an Asus VG248QE and it supports 144hz.
I plugged my monitor with a DisplayPort cable 1.2 and when I entered Nvidia control panel->Change Resolution->2.Resolution that I have two options.
There is a tab called Ultra HD,HD,SD and displays:"1080p,1920x1080(native)" which I know but it won't allow me to put the 144hz option at refresh rate.
And then there is another tab called PC which has 1920x1080 again but it allows me to put it to 144hz.
What's the difference and why it won't allow me to put 144hz to both of them?
Can it be because of the cable?
I see that there's a color difference and is ugly at 144hz...
Thank you!