Custom Resolution Utility (CRU)

[ToastyX]

(01-07-2026 12:39 PM)Theonepugna Wrote:  I meant the reverse, ive deleted the tv resolutions and kept one resolution for 59.94hz which madvr says I have no framedrops/repeats, how do I verify if my tv treats the custom resolution different from tv resolution? i have a sony a80l oled, if I set the timing for automatic HDTV I get framedrops like 1.57 in madvr, and if i set the one from madvr its closer to CVT RB in totals but I get the correct playback I think, madvr shows no framedrops/repeated frames

Thats why I would like to know if there would be some visual downgrade

You should be able to see if there's a difference.

[vagrant]

Quick question:
A year or two ago, deleting 4096x resolutions from some displays (like my LG CX) caused a driver bug in the nvidia control panel where 80% of the settings are no longer available. Some settings are still changeable via ProfileInspector, but GPU scaling is not one of them (I need this enabled).
I'm wondering was this ever fixed, or has there been any update on the issue?

[juanme555]

why cant i get 240p to render? im using a CRT Monitor with Displayport to VGA adapter on my GTX 1080 Ti , W10, latest drivers.

On CRU i use the DisplayID 2.0 extension block and 256x240p and 320x240p 120hz both surpass the 30kHz minimum and yet cant render, i thought displayport didnt have the 25mhz minimum pixel clock requirement that HDMI has, so whats the issue?

[ToastyX]

(01-12-2026 03:30 AM)juanme555 Wrote:  why cant i get 240p to render? im using a CRT Monitor with Displayport to VGA adapter on my GTX 1080 Ti , W10, latest drivers.

On CRU i use the DisplayID 2.0 extension block and 256x240p and 320x240p 120hz both surpass the 30kHz minimum and yet cant render, i thought displayport didnt have the 25mhz minimum pixel clock requirement that HDMI has, so whats the issue?

Well I don't know if the GPU actually supports pixel clocks less than 25 MHz with DisplayPort. The driver seems to allow it, but I don't have a way to test it. The adapter would have to support it as well.

[ToastyX]

(01-11-2026 06:46 AM)vagrant Wrote:  Quick question:
A year or two ago, deleting 4096x resolutions from some displays (like my LG CX) caused a driver bug in the nvidia control panel where 80% of the settings are no longer available. Some settings are still changeable via ProfileInspector, but GPU scaling is not one of them (I need this enabled).
I'm wondering was this ever fixed, or has there been any update on the issue?

I don't have any updates on the issue since I don't have a way to trigger it myself. That's something NVIDIA has to deal with. The issue has been around for years, and I'm not sure what the trigger is because not everyone runs into the problem. You can try setting GPU scaling before using CRU, and the setting might stick.

[YETI#4458]

Hello and thank you

Im pretty new to PC (Mac for a long time)

Pixio27u Wave 4k 160hz monitor via DP 2.1 to a new MSI Aegis ZS2 (5080/9900x)

The issue im having is that every time I alt tab out of a game, or when the monitor wakes up from sleep, it reverts back to 60hz.

I went down a chat gbt rabbit hole and troubleshot as much as I could but have not found a solution. Tried doing a "hard reset" i.e. unplug/reboot etc, changing settings in services, its a long list.

With CRU, should I be able to "lock" 160hz? I only use 4k so I would not necessarily change my resolution.

Im not an expert on the technical side, but are there technical/software limits to the monitor/GPU that would cause this? i.e. DSC? (which my monitor does not support) ... in short, is using CRU in this case safe?

TBH I dont think its a significant problem because when it matters i.e. in game, Im still getting up to 158hz (set in nvidia as global limit) according to nvidia/afterburner... but It just seems like its not behaving "normally" and Im looking for a solution.

Thank you

[juanme555]

(01-12-2026 05:32 PM)ToastyX Wrote:  

(01-12-2026 03:30 AM)juanme555 Wrote:  why cant i get 240p to render? im using a CRT Monitor with Displayport to VGA adapter on my GTX 1080 Ti , W10, latest drivers.

On CRU i use the DisplayID 2.0 extension block and 256x240p and 320x240p 120hz both surpass the 30kHz minimum and yet cant render, i thought displayport didnt have the 25mhz minimum pixel clock requirement that HDMI has, so whats the issue?

Well I don't know if the GPU actually supports pixel clocks less than 25 MHz with DisplayPort. The driver seems to allow it, but I don't have a way to test it. The adapter would have to support it as well.

only once, when i first tried it, it worked.

Then only blackscreen.

[Presently42]

Yet another black screen of despair: changes in cru to the televisor's settings, including to previously working ones!, result in a black tv screen and a frozen or black lappy screen upon hdmi connexion; with an hdmi disconnexion and hard reboot being needed to unfreeze or unblacken the lappy's screen. I not infrequently have this problem, and can never recall what was done to solve it; and I'm tired of doing battle rather than enjoying films and videos at exactly the right frame rate.

I'd attach logs, but I know of none to attach. As to my system:

Acer Nitro 5 lappy
AMD ryzen with integrated radeon
Nvidia gtx 1650
HDMI 2.0
Televisor capable of everything and anything my lappy can produce

I'm doing something wrong - I just can't figure out what. Any clues?

[RyanJW]

Sorry for what might be a rudimentary question but I’ve spent literally hours tinkering with CRU and my NVIDIA 4070 drivers to no success.

What I want is my LG C9 (which is natively 120Hz but supports 60Hz and 100Hz as standard options and allows pretty much anything if VRR is engaged) to run at 4K@75Hz. This is so I can run without VRR as unfortunately I experience flickering in some games when VRR is engaged.

I have been able to add it as a custom resolution using the Display 2 block however when it switches to it the screen becomes really distorted, like it’s stretched and going way off screen. This is the same if I add it as a cordon resolution via NVIDIA CP.

Any tips or advice on how I might achieve this?

[markp]

Hello ToastyX, first of all thanks for all the hard work and efforts done in the CRU. I discovered this wonderful tool a few days ago but after going through posts and readings multiple days, I still have not been able to configure everything correctly.

I have been given a 27inch monitor (Lenovo Thinkvision), default resolution 1920x1080p. I am trying to force a resolution increase to whatever pixel clock I am allowed to (i.e. 2560x1440p @60Hz@50Hz, etc), so items are smaller.

Setup Details:
- Windows 11 (25H2)
- Laptop: Lenovo ThinkBook 14 G8 IRL
- iGPU (Intel i7 Core 240H): Intel Graphics with 32.0.101.7076 driver (Intel Graphics Software: set to GPU Scaling and Preserve Aspect Ratio)
- Monitor: Lenovo Thinkvision 27" E27-40 (H25270FE0). LCD IPS-Type, Max. Clock 240Mhz. Driver up-to-date.
- HDMI 1.4 Cable.

What I have tried so far using CRU 1.5.3:
- Followed all the CRU instructions for my use case.
- I am within monitor Vert./Horizontal frequency limits and max. clock frequency.
- Tried CVT-RB and Exact Reduced for timing (various resolutions and refresh rates to ensure pixel clock limit for hdmi 1.4 is not exceeded). I have tried with other timings as well with no success.
- Tried default extension block / default extension block with HDMI2.0 addition.
- Tried deleting default Extension Block (CT-861), and creating a new one with HDMI and HDMI2.0 data blocks.
- Tried various settings for Intel Graphics Software (for now I am sticking with Scaling Mode/Method: GPU Scaling/Preserve Aspect Ratio).

From what I have read, I should not be hitting max. pixel clock rates, 2176x1224p @50Hz is less than 150Mhz, and 2560x1440p @60Hz returns 236Mhz. I am not sure where the problem might be coming from.

Cannot use DP interface because the laptop has no such input, and using an adapter will probably over-complicate more the setup (being a newbie in this).

Any tip or recommendation would be much appreciated.

Thank you very much!