Downsampling vs actual monitor resolution ?

[Dicehunter]

I've been playing around with downsampling on my 1080P monitor while I wait for my 2560x1440 monitor to arrive and was wondering, If I downsample to 1440P through the Nvidia control panel how close is that to an actual 1440P panel in terms of performance and image quality ?

*EDIT* I know the term downsampling doesn't make any sense as I am increasing the resolution but that's what every guide on the net calls it.

 

[Dicehunter]

A 1080p screen doesn't support 2560x1440.

However, there is super sampling AA which renders at higher resolution and down samples making edges appear smoother.

Look in the Nvidia control panel, There's an option for custom resolutions, One being the ability to support higher resolutions than the panel supports.
Not sure how it works though.

 

[Dicehunter]

Necro thread much ?