Question about 4K displays?

Hi, I'm looking to purchase a new laptop soon and I noticed now that some laptops offer 4K resolution on their monitor. My question is this:

Since I know that a GTX980m won't be able to power "ultra" quality gaming at 4K resolution, if I were to play at 1920x1080 resolution, would the objects on the screen change proportions like they do currently if I try to play something at 1280x720 on my 1920x1080 native display?

Thanks!

 

You won't have problems playing at 4k res for most games on excellent details.. From what I know, most people with 4k screens play at 1080p as the upscaling effect makes games look the same as playing at 4k.. You won't have the effect your talking about with 1280x720 on 1080p display doing this on a 4k screen at 1080p..

 

You do know that to get 4K you have the use the display port not the DVI port and then your monitor has to support 4K input to begin to play at 4K DVI will not do 4K.

 

No.

You see distortion when displaying 1280x720 on a 1080p because the pixels on the image do not properly line up with the pixels of the display. A 1080p display is a rectangle of 1920x1080 pixels. If you try to display an image made up of 1280x720 pixels, each pixel of the image is 1.5 times taller and wider than the pixels of the display. So some of the pixels in the image end up getting shrunk while others get stretched to line up with the pixels of the display.

4K, or 3840x2160, however, has the advantage of having exactly 4 times as many pixels as 1080p - it is twice as many pixels wide and twice as many tall. So when you display an image made up of 1920x1080 pixels on a display with 3840x2160 pixels, each pixel of the image is twice as tall and twice as wide as the pixels on the display, so each pixel gets represented as a 2x2 square of display pixels, thus avoiding distortion.

 

4k scaled down to 2k resolution won't give you any blur as it'll use exactly 4 pixels in a square for 1 pixel. the blur you're worried about only occurs when trying to scale down not in exact numbers (eg 1080p is 720px1.5, and you can't have 1.5 pixels so the computer uses methods to make it work, which caue some blur).

 

What?

Isn't OP talking about the display built into the laptop?


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And just when you thought things are complicated enough 3840x2160 is not true 4K. Rather, UHD -- which in itself come with its own set of complications since it can also refers to any resolution beyond HD.

In any event, True 4K (4096 x 2160) and UHD (3840x2160) tend to be used interchangeably for now. Although as mentioned, UHD scales precisely so it tends to be the "4K" choice at the moment. Just another caveat to keep in mind should it ever make a difference to you at some point.

 

Yes he is.. Wonder what happened there...

In essence, Delta V's explanation hit the nail on the head and was exactly what I meant.. + rep

 

Nope: 1080p -> 2160p Pixel Quadrupling / Custom Resolutions - Guru3D.com Forums

 

After using a 4k screen for a while with the 980m, I can say that 1080p scaling is great. 1080p is already high resolution, and scaling up to 4k on a 15" LCD you really don't notice any blurriness or jaggies, and nothing that 2xMSAA (or your AA flavor of the day) can't fix.

 

If one is using anti-aliasing at 4x or higher, you might as well just play at the higher resolution with anti-aliasing disabled.

 

Not even close. The performance difference is quite significant between AA at 1080p and native 4k without AA. FSAA or SSAA of course, it's basically the same thing as rendering at the higher res, but MSAA and CSAA are a fraction of the hit in performance with little to no difference in quality.