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colemar · 11-02-2017, 10:54 AM

Hello, I wonder whether CRU can help me solve the following problem.

I have a Sony Bravia 4K TV (KD-43X8309C) connected via high-speed HDMI cable to a Nvidia GTX 1060 running under Windows 10 64-bit.
Windows 10 and the Nvidia control panel report that the display has 1920x1080 native resolution, which of course is wrong because the TV has a 3840x2160 LCD panel and it officially supports HDMI 2.0 (at least when the HDMI input is set to "advanced" as it is).
This is not actually a problem because I can easily select 3840x2160 60 Hz in the Nvidia control panel and the Windows desktop is rendered beautifully.

But sometimes the wrong info about native resolution could have adverse effects.
The Nvidia control panel has a tab devoted to "GPU scaling" in which I can select [GPU] or [Display] scaling. When I select [GPU] any full-screen program that outputs a low resolution should be upscaled to the current resolution (which I set to 3840x2160) before reaching the HDMI output.
This feature is not working properly because irrespective of the scaling setting:

when I run Fallout 4 or Prey at 1920x1080 the TV display flickers then shows a banner telling that 1920x1080 is in effect
when I run Fallout 4 or Prey at 2560x1440 the TV display does not flicker and the banner tells that 3840x2160 is in effect

The resulting picture at 1920x1080 is good enough but alt-tabbing to the Windows desktop and back more often than not confuses the game. Furthermore, the GPU could do a better job in upscaling compared to the TV hardware.

I believe that the driver thinks that the display is 1920x1080 therefore it decides to not upscale the same resolution.

The HDMI cable in use is sold with this advice: "Meets the latest HDMI standards (4K Video at 60 Hz, 2160p, 48 bit/px color depth) that supports bandwidth up to 18Gbps".
TV firmware and Nvidia driver are updated to the latest version.

Already contacted Sony and Nvidia but they are not terribly helpful to date.

I feel that perhaps CRU can tell the Nvidia driver that the display has 3840x2160 native resolution, but I am afraid I don't understand how.

***ToastyX*** · 11-03-2017, 01:20 AM

(11-02-2017 10:54 AM)colemar Wrote: I feel that perhaps CRU can tell the Nvidia driver that the display has 3840x2160 native resolution, but I am afraid I don't understand how.

The instructions are in the first post. Make 3840x2160 @ 60 Hz the first detailed resolution. Windows should list 3840x2160 as the recommended resolution if it's considered native.

ghliang · 11-03-2017, 09:29 AM

Looking for solution. Can't seem to add any CRU setting on the laptop display. Followed all the steps. CRU seems not working. Confused

Illegear Z7
AUO 109D 1920x1080 17"3 Display
i7 7th gen
intel 630 (laptop display) & gtx 1050 ti

Any help with be much appreciated. Heart

colemar · 11-03-2017, 06:50 PM

(11-03-2017 01:20 AM)ToastyX Wrote:
(11-02-2017 10:54 AM)colemar Wrote: I feel that perhaps CRU can tell the Nvidia driver that the display has 3840x2160 native resolution, but I am afraid I don't understand how.
The instructions are in the first post. Make 3840x2160 @ 60 Hz the first detailed resolution. Windows should list 3840x2160 as the recommended resolution if it's considered native.

This is amazing!
Now the GPU scaling works as expected.

Thank you very much!

Szaby59 · (Last edited: 11-05-2017, 03:36 PM by Szaby59)

Hello,
Tried to use the app to remove the 59, 50, 30, 29 Hz etc. refresh rates for 1080p and only keep 60, 75 Hz by removing the "TV resolutions" extensions block. It works fine on an nVidia GTX 970, but it doesn't work on my R9 Fury and according to this https://www.reddit.com/r/Amd/comments/79...solutions/ doesn't work on RX 470 either.
Do you guys know how to achieve this on AMD cards ? I use the latest 17.11.1 driver btw.

***ToastyX*** · 11-05-2017, 05:12 PM

(11-05-2017 03:26 PM)Szaby59 Wrote: Tried to use the app to remove the 59, 50, 30, 29 Hz etc. refresh rates for 1080p and only keep 60, 75 Hz by removing the "TV resolutions" extensions block. It works fine on an nVidia GTX 970, but it doesn't work on my R9 Fury and according to this https://www.reddit.com/r/Amd/comments/79...solutions/ doesn't work on RX 470 either.
Do you guys know how to achieve this on AMD cards ? I use the latest 17.11.1 driver btw.

AMD's driver forces those resolutions to exist.

oDi · 11-07-2017, 10:02 PM

Hi to all. I am trying to create a custom resolution of 3840x1620 at 50 hz in my Samsung KS7500 Tv . I also want to have yuv420 support . I can't achieve it no matter what settings/timings i enter . Through Nvidia control panel i can achieve the resolution and the refresh rate but not the yuv420 mode , only Rgb. Through Cru i always get 60 hz no matter what . The Yuv420 support is ok though . Any help would be appreciated . 4k resolution is really too much even for my gtx 1080 ti , but a lower resolution at 50 hz is much better . The fact that i need Yuv420 has to do with HDR (it is not working in Rgb) and also because of a weird bug (don't know who to blame) in which at 50 hz COMBINED with Rgb every 30 minutes or so in every game i have a horrible horizontal line like screen tear that starts from the bottom and goes all the way up in approx. 2 - 3 minutes . This thing does not happen at Yuv420 and 50 hz .

***ToastyX*** · 11-09-2017, 09:26 PM

(11-07-2017 10:02 PM)oDi Wrote: Hi to all. I am trying to create a custom resolution of 3840x1620 at 50 hz in my Samsung KS7500 Tv . I also want to have yuv420 support . I can't achieve it no matter what settings/timings i enter .

It's not possible to create custom 4:2:0 resolutions. Only specific TV resolutions can be 4:2:0.

mrkukov · (Last edited: 11-10-2017, 05:33 PM by mrkukov)

Trying to get my Crossover Q27 (1440p@60Hz) to run over HDMI-to-DVI... no luck. It's Dual-Link-DVI only and I'm just trying to get freesync to work.
I can "OC" the monitor to run between 55.1 - 64.9Hz with active DP to DVI adapter (since Vega does not have DVI-port). Still not able to set freesync for that refreshrate range while using the adapter. Nice monitor but not able to hack freesync to it. Just FYI for people with google. :/

Edit: ...and using second monitor to change settings since Q27 does not produce any picture with HDMI-to-DVI adapter or DP-to-DVI adapter.

***ToastyX*** · 11-10-2017, 08:06 PM

(11-10-2017 05:01 PM)mrkukov Wrote: Trying to get my Crossover Q27 (1440p@60Hz) to run over HDMI-to-DVI... no luck. It's Dual-Link-DVI only and I'm just trying to get freesync to work.
I can "OC" the monitor to run between 55.1 - 64.9Hz with active DP to DVI adapter (since Vega does not have DVI-port). Still not able to set freesync for that refreshrate range while using the adapter. Nice monitor but not able to hack freesync to it. Just FYI for people with google. :/

Edit: ...and using second monitor to change settings since Q27 does not produce any picture with HDMI-to-DVI adapter or DP-to-DVI adapter.

You'll need the pixel clock patch to use HDMI-DVI or DP-DVI: https://www.monitortests.com/forum/Threa...ck-Patcher