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Case · 01-04-2025, 12:51 AM

(01-02-2025 03:16 AM)ozzuneoj Wrote: I like to use DLDSR for super smooth scaling in older games, but it seems the wonderfully made Nvidia drivers will provide high resolution DSR modes while limiting them to 60Hz on a 240Hz display. Like... why? Why is customizing DLDSR refresh rates not a setting in the control panel? Why isn't it just sending a native 2560x1440@240hz signal to the display when using DLDSR? I can override it with CRU by deleting absolutely all other resolutions that aren't 240Hz and it works totally fine. Why can't nvidia just make this the default behavior? The mind boggles...

Maybe you're running into DSC issues? A 1440p 240Hz monitor at 8 bit color depth may or may not require DSC at that resolution and refresh rate. And in most cases (though, weirdly enough, apparently not in all of them), nVidia disables several features in their drivers if the monitor is using DSC, DLDSR being one of them.

I have a 4k monitor that is using DSC at all times in game mode regardless of refresh rate, so no DLDSR for me, ever.

willianwojcik · 01-04-2025, 01:15 AM

(08-30-2024 02:09 PM)willianwojcik Wrote: Hello

I've been using CRU since I bought an OLED C2 in early 2023. The software is exceptional, it helped me set the 3840x1600 ultrawide resolution as native in the NVIDIA control panel

About that, since the latest 556.12 driver, the 3840x1600 ultrawide resolution is locked at 60Hz only

There is nothing wrong with the CRU, just the NVIDIA drivers are problematic, as always

Several other users are reporting to NVIDIA, including me, waiting for a solution

https://www.nvidia.com/en-us/geforce/for...d-at-60hz/

(01-02-2025 02:22 AM)ozzuneoj Wrote: 1. I like to use DLDSR for super smooth scaling in older games, but it seems the wonderfully made Nvidia drivers will provide high resolution DSR modes while limiting them to 60Hz on a 240Hz display. Like... why? Why is customizing DLDSR refresh rates not a setting in the control panel? Why isn't it just sending a native 2560x1440@240hz signal to the display when using DLDSR? I can override it with CRU by deleting absolutely all other resolutions that aren't 240Hz and it works totally fine. Why can't nvidia just make this the default behavior? The mind boggles...

It seems to be the same problem, or am I mistaken?

wheo9x · 01-04-2025, 01:23 AM

(01-02-2025 03:51 PM)ToastyX Wrote:
(01-02-2025 03:34 PM)wheo9x Wrote: Im trying to do display scaling, ive seen tons of fortnite pros say they don't know how to do it either so they resort to going back to 240hz whilst on a 360hz monitor, all im asking is is there a way to do it or not and if so how?
That's still not telling me the problem. Display scaling is controlled by the monitor. What is the problem you are having that you are trying to use CRU for? What part of CRU are you having trouble with? Why would it not work with 360 Hz?

The method to get a custom stretch res on 240hz when you go to detailed resolutions at the bottom you can only use the options there? the highest it shows is 240hz not 360hz when im using a 360hz monitor, there is no 360hz option and when i try to edit it at the bottom the number goes to red and i can't apply it.

***ToastyX*** · 01-04-2025, 05:25 AM

(01-04-2025 01:23 AM)wheo9x Wrote: The method to get a custom stretch res on 240hz when you go to detailed resolutions at the bottom you can only use the options there? the highest it shows is 240hz not 360hz when im using a 360hz monitor, there is no 360hz option and when i try to edit it at the bottom the number goes to red and i can't apply it.

The first post explains why the number turns red. 1920x1080 @ 360 Hz should already be there in a DisplayID extension block.

***ToastyX*** · 01-04-2025, 05:50 AM

(01-04-2025 01:15 AM)willianwojcik Wrote: It seems to be the same problem, or am I mistaken?

No, he has no problem using 240 Hz without DSR, and his issue happens with older drivers as well. In your case, I have no idea why 120 Hz isn't available even after adding it manually. The only thing that comes to mind is maybe they did some sort of workaround for your TV because of the 2560x1080 issue, so CRU is not having the proper effect. Does anything change if you edit the device ID to anything else using the "Edit..." button at the top?

***ToastyX*** · 01-04-2025, 05:50 AM

(01-04-2025 12:51 AM)Case Wrote: Maybe you're running into DSC issues? A 1440p 240Hz monitor at 8 bit color depth may or may not require DSC at that resolution and refresh rate. And in most cases (though, weirdly enough, apparently not in all of them), nVidia disables several features in their drivers if the monitor is using DSC, DLDSR being one of them.

I have a 4k monitor that is using DSC at all times in game mode regardless of refresh rate, so no DLDSR for me, ever.

2560x1440 @ 240 Hz doesn't require DSC at 8 bpc, and it also doesn't exceed the pixel rate that would cause DSR to be disabled. If it were the DSC issue, then CRU would have no effect either.

***ToastyX*** · 01-04-2025, 05:51 AM

(01-02-2025 06:51 PM)ozzuneoj Wrote: Just confirmed, it happens with DSR and DLDSR on my system. I forgot all about that actually... I think I had the same issue with standard DSR when I was running a GTX 970.

Does your monitor define any resolutions higher than the native resolution by default such as 3840x2160? DSR might be using the highest resolution instead of the native resolution. In that case, deleting the higher resolutions should solve the problem.

wheo9x · 01-04-2025, 09:56 PM

(01-04-2025 05:25 AM)ToastyX Wrote:
(01-04-2025 01:23 AM)wheo9x Wrote: The method to get a custom stretch res on 240hz when you go to detailed resolutions at the bottom you can only use the options there? the highest it shows is 240hz not 360hz when im using a 360hz monitor, there is no 360hz option and when i try to edit it at the bottom the number goes to red and i can't apply it.
The first post explains why the number turns red. 1920x1080 @ 360 Hz should already be there in a DisplayID extension block.

Ah yes i see that now, but then how do you paste it into the top box under detailed resolutions? when i paste it into the detailed resolutions at the top like id normally do its in red, i tried deleting the top detailed resolutions and the middle box and just keeping the displayid and changing it to my specific resolution and i thought it worked at first but it changed it to gpu scaling and my fortnite game looked like this..

Is there any chance you could list exactly how you do it from start to finish please? or some type of youtube video or something?

***ToastyX*** · 01-04-2025, 11:43 PM

(01-04-2025 09:56 PM)wheo9x Wrote: Ah yes i see that now, but then how do you paste it into the top box under detailed resolutions? when i paste it into the detailed resolutions at the top like id normally do its in red, i tried deleting the top detailed resolutions and the middle box and just keeping the displayid and changing it to my specific resolution and i thought it worked at first but it changed it to gpu scaling and my fortnite game looked like this..

Is there any chance you could list exactly how you do it from start to finish please? or some type of youtube video or something?

How to do what exactly? I don't understand why every time someone says "stretched resolution" they are always so vague. I can't give exact instructions if you won't tell me exactly what you're trying to do. Why do you need to paste it into the top box? What exactly are you trying to do?

Saying "stretched resolution" doesn't tell me anything. I already told you, CRU doesn't deal with scaling. You set the resolution you want, and then the monitor scales the resolution if you're using display scaling, or the GPU scales it to the native resolution if you're using GPU scaling. If that doesn't answer your question, then you're not telling me the actual problem.

All CRU can do is control which resolutions are sent to the display and which resolution Windows considers to be the native resolution. Any resolution listed in CRU should be sent to the display if you're using display scaling. The first detailed resolution is considered the native resolution. If you want to change what Windows considers to be the native resolution, the refresh rate part doesn't matter, so if you can't set it to 360 Hz, then just set it to 60 Hz, and add 360 Hz separately in a DisplayID extension block.

juanme555 · 01-04-2025, 11:53 PM

Toasty, do you think it could be possible for graphics cards manufacturers to bypass the 25mhz minimum pixel clock requirement? theoretically speaking i mean.

You mentioned that you were able to make 256x240 120hz on your GTX 1070 through hdmi , in theory, could nvidia intel or amd enable such low resolutions on the displayport out through drivers? or will displayport never be able to carry such a low pixel clock signal?