Custom Resolution Utility (CRU)

[Solaris]

4090 Asus PG27ADQP with DSC =OFF (HDMI 2.1 used)

I am trying to remove the 3840x2160 resolution from the control panel. I have opened the CRU app gone into extension blocks TV resolutions and have removed 3840x2160 entries and then the same under HDMI resolutions.

When saving and restarting my monitor max resolution is 2560x1440 (native) @120hz it will not go up to 240hz which is the max with DSC disabled as i plan to use ELMB mode.

I am not sure why this is happening.

Any help will be appreciated

Thanks

[ToastyX]

(01-08-2025 09:00 AM)Solaris Wrote:  4090 Asus PG27ADQP with DSC =OFF (HDMI 2.1 used)

I am trying to remove the 3840x2160 resolution from the control panel. I have opened the CRU app gone into extension blocks TV resolutions and have removed 3840x2160 entries and then the same under HDMI resolutions.

When saving and restarting my monitor max resolution is 2560x1440 (native) @120hz it will not go up to 240hz which is the max with DSC disabled as i plan to use ELMB mode.

I am not sure why this is happening.

Is there an extension override data block in the first extension block? If so, delete that. Then add a new extension block, change the type to DisplayID, add a detailed resolutions data block, and add 2560x1440 @ 240 Hz in there.

[Huhu3221]

Hello, here is a problem with ASUS XG27AQDMG OLED Display.
Today I tried to change my vrr range limits for display port connection (DSC deactivated)
As said in the main post, I edited the display properties. There I changed the "v-rate" to my desired range of 90 - 144. Unfortunately, there is no effect of this setting on the refresh rate. It exceeds 170Hz although set to 144Hz max.

If I change to HDMI 2.1 connection with different wire, the vrr range setting works but only in the space of 40 - 100 Hz.

Driver is up-to-date.

thanks for the help in advance

[ToastyX]

(Yesterday 04:30 PM)Huhu3221 Wrote:  Hello, here is a problem with ASUS XG27AQDMG OLED Display.
Today I tried to change my vrr range limits for display port connection (DSC deactivated)
As said in the main post, I edited the display properties. There I changed the "v-rate" to my desired range of 90 - 144. Unfortunately, there is no effect of this setting on the refresh rate. It exceeds 170Hz although set to 144Hz max.

If you want to limit the max refresh rate to 144 Hz, you need to set the monitor's refresh rate to 144 Hz in the Windows display settings or in the game's settings. The range must include the currently set refresh rate for VRR to function. You actually don't need to change the range to reduce the max refresh rate because the current refresh rate will always be the max even if the range is higher, so really only the minimum matters.

[Huhu3221]

(Yesterday 05:07 PM)ToastyX Wrote:  

(Yesterday 04:30 PM)Huhu3221 Wrote:  Hello, here is a problem with ASUS XG27AQDMG OLED Display.
Today I tried to change my vrr range limits for display port connection (DSC deactivated)
As said in the main post, I edited the display properties. There I changed the "v-rate" to my desired range of 90 - 144. Unfortunately, there is no effect of this setting on the refresh rate. It exceeds 170Hz although set to 144Hz max.

If you want to limit the max refresh rate to 144 Hz, you need to set the monitor's refresh rate to 144 Hz in the Windows display settings or in the game's settings. The range must include the currently set refresh rate for VRR to function. You actually don't need to change the range to reduce the max refresh rate because the current refresh rate will always be the max even if the range is higher, so really only the minimum matters.

If I set the refresh rate to for example to 80 Hz it makes no impact. Refresh rate goes up with no restriction. Setting in NVCP also doesnt make a difference.
I have an Nvidia RTX3070Ti Card if it matters.

Let's say I only want to limit the max vrr rate to 80 Hz what possibilities do I have?

Edit: maybe I should have said that the monitor performs Low Frame Rate Compensation. I want to disable the LFC through limiting the refresh rate because of vrr flickering. If I only limit the frame rate, in certain circumstances the display raises its refresh rate to double the frame rate.


Thank you, for the fast response!!

[willianwojcik]

(01-05-2025 02:42 PM)ToastyX Wrote:  

(01-05-2025 01:54 PM)willianwojcik Wrote:  Display Properties? I never touched anything

So did you try changing the device ID and making 3840x1600 @ 60 Hz the first detailed resolution and adding 3840x1600 @ 120 Hz in a DisplayID extension block?

Yes, exactly as you said. Unfortunately the same result

It's funny because until driver 556.12 you just had to move 3840x1600 60Hz in "Detailed resolutions", as the first resolution and everything works perfectly

[ToastyX]

(Yesterday 05:37 PM)Huhu3221 Wrote:  If I set the refresh rate to for example to 80 Hz it makes no impact. Refresh rate goes up with no restriction. Setting in NVCP also doesnt make a difference.
I have an Nvidia RTX3070Ti Card if it matters.

What are you using to check the refresh rate? Also the NVIDIA control panel has a "Preferred refresh rate" setting in "Manage 3D settings" that can affect the refresh rate in games. It should be set to "Application-controled" to avoid forcing the highest refresh rate.

(Yesterday 05:37 PM)Huhu3221 Wrote:  Edit: maybe I should have said that the monitor performs Low Frame Rate Compensation. I want to disable the LFC through limiting the refresh rate because of vrr flickering. If I only limit the frame rate, in certain circumstances the display raises its refresh rate to double the frame rate.

Unforuntely NVIDIA doesn't provide a way to disable LFC, and NVIDIA handles LFC differently than AMD. If the range is 90-144 Hz, NVIDIA will still use LFC below 72 FPS, while AMD would disable LFC.

[Huhu3221]

(Yesterday 07:19 PM)ToastyX Wrote:  

(Yesterday 05:37 PM)Huhu3221 Wrote:  If I set the refresh rate to for example to 80 Hz it makes no impact. Refresh rate goes up with no restriction. Setting in NVCP also doesnt make a difference.
I have an Nvidia RTX3070Ti Card if it matters.

What are you using to check the refresh rate? Also the NVIDIA control panel has a "Preferred refresh rate" setting in "Manage 3D settings" that can affect the refresh rate in games. It should be set to "Application-controled" to avoid forcing the highest refresh rate.

I use the OSD of the monitor to check the current refresh rate. In the control panel it's set to "Application-controled".

(Yesterday 05:37 PM)Huhu3221 Wrote:  Edit: maybe I should have said that the monitor performs Low Frame Rate Compensation. I want to disable the LFC through limiting the refresh rate because of vrr flickering. If I only limit the frame rate, in certain circumstances the display raises its refresh rate to double the frame rate.

Unforuntely NVIDIA doesn't provide a way to disable LFC, and NVIDIA handles LFC differently than AMD. If the range is 90-144 Hz, NVIDIA will still use LFC below 72 FPS, while AMD would disable LFC.

I've read this range somewhere on reddit to reuduce the vrr flickering. Maybe the trick is that with this range, the LFC is constantly working and doubles the frames, and you get no flickering.

I think if the refresh rate is locked between for example 40-80 Hz and your Fps won't exceed 40-80 FPS LFC can't double the frames due to limited maximum refreshrate.

My use case is the range from 40-60fps. LFC kicks in at 50fps. With the setting 40 - 100 Hz on HDMI2.1 it will activate at +- 47 FPS, better but not perfect.

I'm a bit confused what refresh rate limits the display actually. The rate set in NVCP does perfectly nothing. 60 Hz or 240 Hz makes no difference for the maximum rate of the display.

Thank you

[ToastyX]

(Yesterday 07:48 PM)Huhu3221 Wrote:  I'm a bit confused what refresh rate limits the display actually. The rate set in NVCP does perfectly nothing. 60 Hz or 240 Hz makes no difference for the maximum rate of the display.

That shouldn't be possible unless the game is forcing the highest refresh rate. If that's the case, then the only option would be to delete the higher refresh rates using CRU.

[Huhu3221]

(Yesterday 08:06 PM)ToastyX Wrote:  

(Yesterday 07:48 PM)Huhu3221 Wrote:  I'm a bit confused what refresh rate limits the display actually. The rate set in NVCP does perfectly nothing. 60 Hz or 240 Hz makes no difference for the maximum rate of the display.

That shouldn't be possible unless the game is forcing the highest refresh rate. If that's the case, then the only option would be to delete the higher refresh rates using CRU.

it's strange, but it looks like.
I've made some screens of my settings, language is German, sorry for that.
With this settings, the refresh rate goes up to 100+Hz.
greetings