Custom Resolution Utility (CRU)

[ToastyX]

(08-26-2025 07:04 PM)sethssl Wrote:  I'm trying to get a new resolutions by making it my native resolutions. What I've been doing is I go to extension blocks and copy one of the detailed resolutions (the one with the Hz I normally use which is the highest). Then delete all extension blocks, delete all standard resolutions and detailed resolutions. then I make a new standard resolutions that matches my monitor but leave it at 60Hz. Then I make a new Detailed resolutions and paste what I took from the extension block and instead of having 1920 x 1080 I swap it to something I want.

I assume I'm doing something wrong because I am removing a lot of stuff. I've followed videos and it is what they say to do.

When I have done this in the past it worked and showed that my native resolution of 1920 x 1080 was no longer recommended and the one that was now my new recommended was the one I just made on CRU. But I cant find the new res I made.

Are you using DisplayPort or HDMI? HDMI requires the HDMI data blocks in the CTA-861 extension block.

[sethssl]

(08-26-2025 07:55 PM)ToastyX Wrote:  

(08-26-2025 07:04 PM)sethssl Wrote:  I'm trying to get a new resolutions by making it my native resolutions. What I've been doing is I go to extension blocks and copy one of the detailed resolutions (the one with the Hz I normally use which is the highest). Then delete all extension blocks, delete all standard resolutions and detailed resolutions. then I make a new standard resolutions that matches my monitor but leave it at 60Hz. Then I make a new Detailed resolutions and paste what I took from the extension block and instead of having 1920 x 1080 I swap it to something I want.

I assume I'm doing something wrong because I am removing a lot of stuff. I've followed videos and it is what they say to do.

When I have done this in the past it worked and showed that my native resolution of 1920 x 1080 was no longer recommended and the one that was now my new recommended was the one I just made on CRU. But I cant find the new res I made.

Are you using DisplayPort or HDMI? HDMI requires the HDMI data blocks in the CTA-861 extension block.

you are awesome! thank you.

[ToastyX]

(08-26-2025 06:37 PM)GGoki Wrote:  I just came here to inform you the exact figure!!

Maximum Pixel Clock:
• NVIDIA Ada GPUs
- 1350 MHz
• NVIDIA Ampere GPUs
- 1335 MHz
• NVIDIA Turing GPUs
- 1330 MHz
• NVIDIA Pascal GPUs
- 1325 MHz
https://www.pny.com/file%20library/compa...upport.pdf

and Blackwell GPUs
- 1620MHz
https://nvidia.custhelp.com/app/answers/...g-behavior

Thanks. I've updated the first post. The problem shouldn't affect Pascal since it doesn't support DSC or using multiple heads. I also added a workaround to disable multiple heads.

[snoopi]

What is the best method and options to use for custom resolutions?
I have RTX 5090 and a zowie 600hz TN monitor via HDMI 2.1. The monitor also has DP 1.4, but I think it uses DSC either way.

My aim is to use 1728x1080 @ 600Hz with Dyac2 and the lowest input lag and possible!

With previous GPUs, I did the registry hack NV_Nodes and everything worked fine. The RTX 5000 cannot do the Nv_Nodes hack anymore. So I use CRU. What timing should i use? Automatic PC or Exact, or Exact reduced? Etc.

Does using CRU and the reccommended timing for my setup affect operation of Dyac?

I would just like the best possible outcome for competative fps gaming. Would appreciate any help here, thank you!

[ToastyX]

(08-28-2025 12:19 AM)snoopi Wrote:  What is the best method and options to use for custom resolutions?
I have RTX 5090 and a zowie 600hz TN monitor via HDMI 2.1. The monitor also has DP 1.4, but I think it uses DSC either way.

My aim is to use 1728x1080 @ 600Hz with Dyac2 and the lowest input lag and possible!

With previous GPUs, I did the registry hack NV_Nodes and everything worked fine. The RTX 5000 cannot do the Nv_Nodes hack anymore. So I use CRU. What timing should i use? Automatic PC or Exact, or Exact reduced? Etc.

Does using CRU and the reccommended timing for my setup affect operation of Dyac?

I would just like the best possible outcome for competative fps gaming. Would appreciate any help here, thank you!

You're talking about three different things.

1. For timing parameters, use whatever works. Normally it's not important, but at 600 Hz, there might be bandwidth limitations that require non-standard timing parameters to reduce the pixel clock. NVIDIA GPUs don't actually support the full HDMI 2.1 bandwidth without using Display Stream Compression (DSC) and multiple heads internally. You might have to disable using multiple heads as described in the first post for CRU to work, but then you'll be limited to the single-head limit. 5000-series GPUs support up to 1620 MHz pixel clock without DSC. For 1728x1080 @ 600 Hz, CVT-RB2 fits just within the 1620 MHz limit. For 1920x1080 @ 600 Hz, you'll have to try the non-standard options if the monitor's default doesn't fit within 1620 MHz.

2. DyAc is for motion clarity at the expense of very slight lag because the backlight needs to be off while the pixels are changing. DyAc works best when the frame rate matches the refresh rate to avoid the double image effect, so you might need to use a lower refresh rate to see the benefits, but that also reduces responsiveness slightly. If variable refresh rate (VRR) is enabled, that is handled automatically, but I don't think DyAc works with VRR. For DyAc, increasing the vertical blanking might reduce ghosting/crosstalk slightly, but it's hard to increase the blanking when the bandwidth is limited, and CVT-RB2 already has the blanking quite high at 600 Hz.

3. For least lag, you would need to disable DyAc and use the highest refresh rate with no frame rate caps.

[Mystery D]

Hello! I have a 1440p 144hz freesync display (Acer EI272UR), with an EVGA RTX 3080 ftw3.

I'm trying to use CRU to allow EITHER freesync or gsync to work - WITHOUT FLICKER. Ive disabled the freesync range in the extension block and freed 50 bytes. I then changed the VRR range by editing the active monitor (topmost edit button) to 47-144, since the default 48-144 is reported as 49-144 by windows 11.

I am unsure if I need to edit the detailed resolution, and/or the CTA-861 detailed resolution to something that will work with less flickering when the framerate is below a certain figure.

I have G-SYNC and G-SYNC compatible enabled via nvidia app, though this monitor is not validated as gsync compatible. With g-sync compatible un-checked, no type of VRR seems to work at all.

Anyone have advice on if there is something I can do to maximize my VRR experience on this Freesync monitor with my Nvidia GPU?

Thanks in advance

[ToastyX]

(08-31-2025 04:52 PM)Mystery D Wrote:  Hello! I have a 1440p 144hz freesync display (Acer EI272UR), with an EVGA RTX 3080 ftw3.

I'm trying to use CRU to allow EITHER freesync or gsync to work - WITHOUT FLICKER. Ive disabled the freesync range in the extension block and freed 50 bytes. I then changed the VRR range by editing the active monitor (topmost edit button) to 47-144, since the default 48-144 is reported as 49-144 by windows 11.

I am unsure if I need to edit the detailed resolution, and/or the CTA-861 detailed resolution to something that will work with less flickering when the framerate is below a certain figure.

I have G-SYNC and G-SYNC compatible enabled via nvidia app, though this monitor is not validated as gsync compatible. With g-sync compatible un-checked, no type of VRR seems to work at all.

Anyone have advice on if there is something I can do to maximize my VRR experience on this Freesync monitor with my Nvidia GPU?

Thanks in advance

FreeSync/G-SYNC should not flicker. That's a monitor design limitation. The only thing you can do is reduce the VRR range or disable VRR.

[French Toast]

(07-13-2025 11:02 PM)ToastyX Wrote:  

(07-12-2025 07:42 PM)French Toast Wrote:  Sorry for late response I am using 100% HDMI 2.0 monitor-24" MSI Optix G24C4 GPU is Intel Core i5 11400H Tiger Lake
MSI Katana GF66 - laptop 144hz at 1920x1080 and I tried the pixel clock thing for nividia but it says file too large or something

also tried with other patop 144.01hz showed automatically worked like magic it has to be something with this laptop cable n monitor work

You are hitting some sort of pixel clock limit on the laptop's end from the Intel GPU. I don't see any indication that the monitor supports HDMI 2.0. 1920x1080 @ 144 Hz is possible with HDMI 1.4, but the pixel clock is limited to 340 MHz. I don't know how that translates to 134 Hz because you didn't mention what timing parameters you used. "Exact" and "CVT-RB2" both keep the pixel clock under 340 MHz. Intel GPUs historically limited HDMI 1.4 to 300.99 MHz, but your laptop supposedly supports HDMI 2.1, so it should be able to handle the full 340 MHz for HDMI 1.4. If not, try adding an HDMI 2.x data block in the CTA-861 extension block.

OMG YOU ARE A LEGEND IT WORKS NOW I GOT 144HZ!!!!!!!!!! I deeply thank you man

---

(07-13-2025 11:02 PM)ToastyX Wrote:  

(07-12-2025 07:42 PM)French Toast Wrote:  Sorry for late response I am using 100% HDMI 2.0 monitor-24" MSI Optix G24C4 GPU is Intel Core i5 11400H Tiger Lake
MSI Katana GF66 - laptop 144hz at 1920x1080 and I tried the pixel clock thing for nividia but it says file too large or something

also tried with other patop 144.01hz showed automatically worked like magic it has to be something with this laptop cable n monitor work

You are hitting some sort of pixel clock limit on the laptop's end from the Intel GPU. I don't see any indication that the monitor supports HDMI 2.0. 1920x1080 @ 144 Hz is possible with HDMI 1.4, but the pixel clock is limited to 340 MHz. I don't know how that translates to 134 Hz because you didn't mention what timing parameters you used. "Exact" and "CVT-RB2" both keep the pixel clock under 340 MHz. Intel GPUs historically limited HDMI 1.4 to 300.99 MHz, but your laptop supposedly supports HDMI 2.1, so it should be able to handle the full 340 MHz for HDMI 1.4. If not, try adding an HDMI 2.x data block in the CTA-861 extension block.

OMG YOU ARE A LEGEND IT WORKS NOW I GOT 144HZ!!!!!!!!!! I deeply thank you man

[plamenmilev@gmail.com]

Hello!

I have Asus MS27UC 4k monitor and Intel Integrated Graphics 750 (11th Intel gen).

Unfortunately, my hdmi out is only version 1.4.

However, I am trying to make it work with 1440p (2560 x 1440) resolution. I have added this as a detailed resolution in CRU (I chose AutomaticHDTV).

After restarting, as kindly explained here, this resolution doesn't show up in "List all modes".

I would appreciate your help.

Best,
Plamen