Custom Resolution Utility (CRU)

[AssadFaszad]

(10-22-2026 07:09 PM)MUC Wrote:  

(10-20-2026 10:29 PM)AssadFaszad Wrote:  By any chance do you know if it's possible to have above 8bit color depth on laptops?

In principle, yes. Provided the panel supports it. But the original EDID of your built-in laptop screen explicitly states: "Bits per primary color channel: 8". It can therefore be assumed that 10-bit is either not supported or would lead to undesirable results.

Managed to get it working fine so far (very limited testing) <=144Hz@10bit. Just gotta stay below 564-565MHz pixel clock.

[juanme555]

Hey Toasty i have a question, today i was testing some CRT Monitors and in one (LG Flatron EZ T910B) i was able to use 1920x1440p50hz (standard cvt timings) at 10-bit color depth, i was not trying to do so it just happened to be the case when i was testing my new DAC (RTD2166) , i have now switched back to a Samsung Syncmaster 997DF , how do i pick the color depth? all resolutions seem to be 6 or 8 bit color depth, but i saw the other monitor running at 10bit , both are crt.

[ToastyX]

(11-09-2026 03:14 AM)juanme555 Wrote:  Hey Toasty i have a question, today i was testing some CRT Monitors and in one (LG Flatron EZ T910B) i was able to use 1920x1440p50hz (standard cvt timings) at 10-bit color depth, i was not trying to do so it just happened to be the case when i was testing my new DAC (RTD2166) , i have now switched back to a Samsung Syncmaster 997DF , how do i pick the color depth? all resolutions seem to be 6 or 8 bit color depth, but i saw the other monitor running at 10bit , both are crt.

If you click the "Edit..." button at the top, do you see an option for maximum color depth?

[juanme555]

(11-09-2026 04:07 AM)ToastyX Wrote:  

(11-09-2026 03:14 AM)juanme555 Wrote:  Hey Toasty i have a question, today i was testing some CRT Monitors and in one (LG Flatron EZ T910B) i was able to use 1920x1440p50hz (standard cvt timings) at 10-bit color depth, i was not trying to do so it just happened to be the case when i was testing my new DAC (RTD2166) , i have now switched back to a Samsung Syncmaster 997DF , how do i pick the color depth? all resolutions seem to be 6 or 8 bit color depth, but i saw the other monitor running at 10bit , both are crt.

If you click the "Edit..." button at the top, do you see an option for maximum color depth?

yes i see it

[CallMeRive]

Curios, if anybody has a ready CRU profile for the good old LG Flatron F900P CRT monitor? I got 1600x1200 at some decent freq working, but not sure about other resolutions, cause my Windows 11 seems to be just scaling them up to 1600x1200. Couldn't find a way to stop it from scaling and actually force it to change the resolution (for example, the monitor can do 1280x960 at 100 Hz and 1024x768 at 120 Hz - would be nice to have these options available).
(I use this old monitor for my retro-PC needs, but since the monitor has two inputs anyway, I connected the second input to my modern PC via DP-to-VGA adapter).

[corten928]

ASUS VG249QM5A keeps reverting from 180 Hz to 144 Hz after every restart

I’m having a frustrating issue with my ASUS VG249QM5A monitor and my NVIDIA RTX 4060 on Windows 10 (64-bit).

My monitor normally supports a maximum refresh rate of 240 Hz. However, I’m deliberately using 180 Hz because my PC doesn’t consistently produce enough FPS to make proper use of 240 Hz.

The problem is that every time I restart my PC, Windows automatically switches back to 144 Hz instead of keeping my preferred 180 Hz setting.

I’ve already tried several things to fix this issue, but nothing has permanently solved it:

* Used Custom Resolution Utility (CRU) to create a custom 180 Hz resolution.
* Used CRU’s restart64.exe to reload the display driver.
* Tried selecting 180 Hz in both Windows Display Settings and the NVIDIA Control Panel.
* Disabled Windows Fast Startup.
* Checked that the NVIDIA Display Container LS service is running and set to automatic.
* Disabled G-SYNC.
* Reinstalled the NVIDIA driver using DDU.
* Tried using NirCmd to force the display to 180 Hz.

The strange thing is that CRU still shows the custom 180 Hz resolution after restarting, but Windows keeps reverting to 144 Hz.

There is also an interesting detail: after selecting 180 Hz in the NVIDIA Control Panel, pressing Win + Ctrl + Shift + B (resetting the graphics driver) makes 180 Hz work correctly again. My NVIDIA Digital Vibrance setting also stays at my preferred value after doing this.

So the monitor and GPU are clearly capable of running at 180 Hz. It seems that something during Windows startup or NVIDIA driver initialization is preventing my preferred settings from being applied correctly.

I’m looking for a permanent solution that makes Windows start at 180 Hz automatically without having to manually change settings or restart the graphics driver every time.

Has anyone experienced something similar or found a reliable fix?

[MUC]

(11-12-2026 06:20 AM)corten928 Wrote:  Has anyone experienced something similar or found a reliable fix?

Please run edid-test.exe on your PC:
https://www.monitortests.com/edid-test.zip

This will create a file named "edid-test.TXT" in the same folder, containing the EDID HEX code. Please attach this TXT file here.

[ToastyX]

(11-12-2026 01:32 AM)CallMeRive Wrote:  Curios, if anybody has a ready CRU profile for the good old LG Flatron F900P CRT monitor? I got 1600x1200 at some decent freq working, but not sure about other resolutions, cause my Windows 11 seems to be just scaling them up to 1600x1200. Couldn't find a way to stop it from scaling and actually force it to change the resolution (for example, the monitor can do 1280x960 at 100 Hz and 1024x768 at 120 Hz - would be nice to have these options available).
(I use this old monitor for my retro-PC needs, but since the monitor has two inputs anyway, I connected the second input to my modern PC via DP-to-VGA adapter).

The Windows display settings scales lower resolutions unless you change the refresh rate. Try going to advanced display settings, display adapter properties, list all modes, and see if that behaves differently.

[MPS]

(11-12-2026 06:20 AM)corten928 Wrote:  ASUS VG249QM5A keeps reverting from 180 Hz to 144 Hz after every restart

I’m having a frustrating issue with my ASUS VG249QM5A monitor and my NVIDIA RTX 4060 on Windows 10 (64-bit).

My monitor normally supports a maximum refresh rate of 240 Hz. However, I’m deliberately using 180 Hz because my PC doesn’t consistently produce enough FPS to make proper use of 240 Hz.

The problem is that every time I restart my PC, Windows automatically switches back to 144 Hz instead of keeping my preferred 180 Hz setting.

I’ve already tried several things to fix this issue, but nothing has permanently solved it:

* Used Custom Resolution Utility (CRU) to create a custom 180 Hz resolution.
* Used CRU’s restart64.exe to reload the display driver.
* Tried selecting 180 Hz in both Windows Display Settings and the NVIDIA Control Panel.
* Disabled Windows Fast Startup.
* Checked that the NVIDIA Display Container LS service is running and set to automatic.
* Disabled G-SYNC.
* Reinstalled the NVIDIA driver using DDU.
* Tried using NirCmd to force the display to 180 Hz.

The strange thing is that CRU still shows the custom 180 Hz resolution after restarting, but Windows keeps reverting to 144 Hz.

There is also an interesting detail: after selecting 180 Hz in the NVIDIA Control Panel, pressing Win + Ctrl + Shift + B (resetting the graphics driver) makes 180 Hz work correctly again. My NVIDIA Digital Vibrance setting also stays at my preferred value after doing this.

So the monitor and GPU are clearly capable of running at 180 Hz. It seems that something during Windows startup or NVIDIA driver initialization is preventing my preferred settings from being applied correctly.

I’m looking for a permanent solution that makes Windows start at 180 Hz automatically without having to manually change settings or restart the graphics driver every time.

Has anyone experienced something similar or found a reliable fix?

Same here, i've reinstalled Windows 10 today and after i've set up CRU to use an specific Hz value for my monitor, it seems to ignore it during startup and it stays until i change the resolution or pressing Win+Ctrl+Shift+B. Same NVIDIA drivers as before and everything, tried uninstalling updates and keeps happening. Completely weird.

[MUC]

(Yesterday 11:24 PM)MPS Wrote:  Completely weird.

Please show us your original EDID.
Run edid-test.exe on your PC:
https://www.monitortests.com/edid-test.zip

This will create a file named "edid-test.TXT" in the same folder, containing the EDID HEX code. Please attach this TXT file here.