admin edit: added video inspired by this thread.
WARNING: I haven't seen anyone encountering this but just like overclocking, there is an inherent risk of damaging your display and it may not be covered by its warranty. It may not even be able to achieve the same settings other people are able to get.
Note: I did not make this guide but have used it on all of my monitors without any problems. Credits are due to the ones that originally posted these on another forum.
What this guide is all about is how to get higher resolutions than what your display is capable of. It is called Downsampling. What it basically does is to have your GPU artificially push a resolution that's over what your display is able to do. The impact it will have on your GPU is equivalent to what it would do on a display that can actually output that resolution natively.
Your display is natively able to support a resolution up to 1920x1080. Using Downsampling it will send out a signal to tell your display to output a resolution of 2560x1440. Now on a display that can output a maximum resolution of 1080p has about 2 million pixels while a 1440p display outputs 3.7 million. Downsampling does not increase the amount of pixels being displayed. Itcan't go beyond that. What it does is bring that 1440p resolution to your 1080p display and compresses it to fit inside the screen. The effect it has is similar to zooming out on a lower resolution picture.
Below, you can see the difference in image quality on both images taken on the same display. Both images are using the same settings but with different resolutions.
Native 1080p resolution image viewed on a 1080p display:
Same image with a downsampled resolution of 3680x2070 on the same 1080p display:
Downsampling guide for NVIDIA cards: http://www.neogaf.co...ad.php?t=509076
Downsampling guide for AMD cards: http://forums.guru3d...ad.php?t=366244