Custom Resolution Utility (CRU)

[ToastyX]

(01-13-2026 04:25 AM)YETI#4458 Wrote:  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

I don't know what would cause that to happen, but you can use CRU to delete every refresh rate except 160 Hz.

[ToastyX]

(01-13-2026 09:44 PM)juanme555 Wrote:  only once, when i first tried it, it worked.

Then only blackscreen.

You can try increasing the blanking to raise the pixel clock above 25 MHz if the monitor can handle that.

[ToastyX]

(Yesterday 01:10 AM)Presently42 Wrote:  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?

If the system freezes, that can only be a graphics driver bug. I'm not sure how it works on laptops with both AMD and NVIDIA GPUs, but on systems with a dedicated NVIDIA GPU, it's NVIDIA's driver causing this when there are multiple displays and at least one display has G-SYNC/VRR enabled.

[ToastyX]

(Yesterday 11:52 AM)RyanJW Wrote:  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?

If "Native HDTV" and "CVT-RB" timing don't display correctly, then the TV probably doesn't support custom refresh rates.

[ToastyX]

(Yesterday 12:45 PM)markp Wrote:  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.

You didn't say what happens. There's no guarantee a monitor will accept higher than native resolutions even if it's within the pixel clock limits.

[juanme555]

(Yesterday 02:19 PM)ToastyX Wrote:  

(01-13-2026 09:44 PM)juanme555 Wrote:  only once, when i first tried it, it worked.

Then only blackscreen.

You can try increasing the blanking to raise the pixel clock above 25 MHz if the monitor can handle that.

i increased blanking and it let me render 320x240p 120hz , but now i have black bars on all 4 sides of the picture which i cant correct through OSD , is there a way to have 320x240 covering the full screen?

[ToastyX]

(Yesterday 06:18 PM)juanme555 Wrote:  i increased blanking and it let me render 320x240p 120hz , but now i have black bars on all 4 sides of the picture which i cant correct through OSD , is there a way to have 320x240 covering the full screen?

Probably not. Another option is to try a higher refresh rate like 240 Hz.

[vagrant]

(01-12-2026 05:32 PM)ToastyX Wrote:  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.

Thanks, unfortunately scaling settings are lost when edid settings are applied.
I even tried enabling gpu scaling via registry and it was was already on.
I also tried changing all 4096x resolutions to 3840x2160 instead of deleting them.. same result.
Seems the slightest edid alteration and the driver goes into lockdown mode

[Presently42]

(Yesterday 02:19 PM)ToastyX Wrote:  If the system freezes, that can only be a graphics driver bug. I'm not sure how it works on laptops with both AMD and NVIDIA GPUs, but on systems with a dedicated NVIDIA GPU, it's NVIDIA's driver causing this when there are multiple displays and at least one display has G-SYNC/VRR enabled.

I can't believe it. G-SYNC in the Nvidia control panel, and thus on the televisor, was the issue. Unreal. I've been wracking my brains over this for YEARS. Oddly, the altered EDID info does work with G-SYNC enabled - I just can't change anything. I'll test a bit more. Thanks ever so much!!!

[markp]

(Yesterday 02:20 PM)ToastyX Wrote:  

(Yesterday 12:45 PM)markp Wrote:  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.

You didn't say what happens. There's no guarantee a monitor will accept higher than native resolutions even if it's within the pixel clock limits.

Thanks for the reply. I have tried several resolutions and refresh rates with no luck so far. Screen always displays "Input Not Supported".

I am trying to force an increase of resolution to avoid working on a 27" screen in 1080p, as displayed icons are very large.

Thanks