Attempting to run my monitor in a 4:3 Custom resolution at 144hz and it doesn't work

[bmulhollandart]

Every time I turn on my custom resolution (1440x1080, 4:3) it turns off 144hz. When I attempt to turn on 144hz with this resolution, my monitor switches to 600x480 res or something similar.

I use AMD (Radeon HD 7950) and have an i7, my monitor is an Acer GN246HL

Using this resolution at 144hz in the game I need it for is super beneficial so not being able to do it really sucks, i'd appreciate it so much if I could get some help or know what part of mine isn't allowing this to work so I can maybe replace it!

Would it potentially be a cable issue? I'm using a white DVI I cable currently.

Thank you so much guys, much love

 

[Barty1884]

It's very likely a cable issue, yes.

Try DisplayPort.
http://www.tomshardware.co.uk/forum/id-3675170/connect-120-display-construction.html?_ga=2.84653913.1517713060.1531881111-446414669.1530066852

 

[Glenwing]

The GN246HL doesn't have DisplayPort.

 

[spdragoo]

https://uk.answers.acer.com/app/answers/detail/a_id/34881/~/gn246hl-1920x1080-%40144-hz-resolution

In order to get a 144Hz refresh rate, you have to use a dual-link DVI cable. If you're not using a dual-link DVI cable, you won't get 144Hz at all. Whether it's DVI-I or DVI-D might depend on the port on the monitor itself, but either way no dual-link = no chance of 144Hz.