Custom Resolution Utility (CRU)

[ToastyX]

(11-28-2016 05:58 PM)Bioshock Wrote:  I have a 4k TV hooked up to my GTX 780 via HDMI, and I'm looking to make a custom resolution of 3840x1600 for ultrawide gameplay.

I am using CRU 1.3, and I have tried LCD-Standard, LCD- Native and Manual as well without changing any options, and this resolution just does not show up at all when I go to select the resolution in Windows, Nvidia CP, or any games. (I do not want this as my native resolution, only for gaming.) My native resolution is 3840x2160 @ 60hz, which is the top resolution in CRU. 3840x1600 is 2nd on the list, and theres one other on there with 1920x1080 @ 60hz.

The GTX 780 does not have HDMI 2.0. 3840x2160 @ 60 Hz should not be possible with HDMI 1.4 except with YCbCr 4:2:0. There's no way to add 3840x1600 @ 60 Hz as a YCbCr 4:2:0 resolution. It should be possible with YCbCr 4:2:2, but the driver might not allow it. To make it work with YCbCr/RGB 4:4:4, you would have to reduce the refresh rate to 50 Hz or lower. I'm not sure what the upper bound is on GTX 780 cards. It should be 340 MHz pixel clock for HDMI 1.4, but some cards might support less.