Custom Resolution Utility (CRU)

[DevilInDisguise]

Just a random bit of information: after seeing Nvidia's message, I tried switching from GPU scaling to Display scaling.
It solved the issue with the malfunctioning Nvidia Control Panel. Now I can modify the EDID for all displays without the control panel bug.

Quote:High bandwidth monitors are those that support display modes requiring high pixel clock rates, which in turn demand more GPU resources. The threshold for what qualifies as "high bandwidth" varies by product. On Blackwell GPUs, any mode operating above 1620 MHz is considered high bandwidth. For instance, the 7680x4320@60Hz mode defined in the CTA-861-H specification runs at 2376 MHz, making it a high bandwidth mode for Blackwell.

These monitors typically support display scaling natively. However, in some single-monitor setups, users may still prefer GPU scaling. When multiple monitors are connected to a GPU and at least one of them is high bandwidth, that monitor will default to display scaling only. GPU scaling is disabled in this case due to bandwidth limitations. Notably, display scaling can be more efficient than GPU scaling in such scenarios, as it reduces the bandwidth load on display cables—especially at higher refresh rates.

When GPU scaling is not enabled for a monitor, only the modes supported by the monitor itself will appear in both the Windows and NVIDIA control panels. Additionally, the "Display scaling" option will be pre-selected in the "Adjust desktop size and position" section of the NVIDIA Control Panel.

[JustMax89]

Hello. I recently purchased a Redmi g27q 180Hz monitor. When connecting it to a PC with a display port cable and an RTX5070 graphics card, I noticed the so-called scan lines on the monitor, also called the Interlace Pattern artifact. Horizontal stripes on blue, orange, and green colors, and these stripes are only in the upper half of the monitor, and are completely absent at the bottom. The stripes are very noticeable at 180 Hz, but if you set 165 Hz in NVCP, the stripes become less noticeable. At 100 Hz, there are no stripes at all. And now the most interesting part. When creating a custom resolution in NVCP 173.942 Hz, the stripes become barely noticeable, but noticeable. At 170 Hz, the stripes are more noticeable than at 180 Hz. But at 158.942 Hz, there are almost no stripes. They are very difficult to notice. And at 144 Hz, the stripes are very noticeable again. That is, as I understand it, the bands appear according to some wave tendency. For myself, using CRU, I set several resolutions. I completely deleted 180 Hz and 165 Hz. I left 173.942, 158.942, 100 and 60 Hz. And I have two questions. Will Gsync work normally if I set 174 Hz in the CRU settings? Since you can't set values with tenths and hundredths there. And is it possible to somehow make it work without bands at 180 Hz? Using CRU and some settings. And many thanks to the author of CRU for such a great application.

[ToastyX]

(08-03-2025 09:05 AM)JustMax89 Wrote:  Hello. I recently purchased a Redmi g27q 180Hz monitor. When connecting it to a PC with a display port cable and an RTX5070 graphics card, I noticed the so-called scan lines on the monitor, also called the Interlace Pattern artifact. Horizontal stripes on blue, orange, and green colors, and these stripes are only in the upper half of the monitor, and are completely absent at the bottom. The stripes are very noticeable at 180 Hz, but if you set 165 Hz in NVCP, the stripes become less noticeable. At 100 Hz, there are no stripes at all. And now the most interesting part. When creating a custom resolution in NVCP 173.942 Hz, the stripes become barely noticeable, but noticeable. At 170 Hz, the stripes are more noticeable than at 180 Hz. But at 158.942 Hz, there are almost no stripes. They are very difficult to notice. And at 144 Hz, the stripes are very noticeable again. That is, as I understand it, the bands appear according to some wave tendency. For myself, using CRU, I set several resolutions. I completely deleted 180 Hz and 165 Hz. I left 173.942, 158.942, 100 and 60 Hz. And I have two questions. Will Gsync work normally if I set 174 Hz in the CRU settings? Since you can't set values with tenths and hundredths there. And is it possible to somehow make it work without bands at 180 Hz? Using CRU and some settings. And many thanks to the author of CRU for such a great application.

Yes, if the refresh rate is less than the maximum G-SYNC/VRR range, the refresh rate becomes the maximum automatically. The lines are a panel-specific design flaw, so I can't advise if there is a way to get rid of them at 180 Hz.

[Tinky]

Hello i hope this still active, i been trying to get stretch res my new monitor which is https://pg.asrock.com/Monitors/PG27FFX2A/index.asp its 520hz out of the box. i have a 4060 TI using display port, im trying to use 1720x1080 with 520hz and the CRU is not allowing me to set it i can only go 300 hz 1720x1080. how can i fix this? please someone help    

[phobos123]

Looks like there might be an incompatibility with the lastest Nvidia 580.88 driver. Have a Samsung TV where it can be overclocked to 144hz. Is a two step process, use CRU to tweak the EDID of my screen that freesync can go up to 144hz, then set a custom resolution in nvidia control panel. Any change to the EDID via CRU with this driver causes Windows to 'span out' when gsync is enabled, even without setting a custom resolution, so at any resolution. Setting a custom resolution works fine, but without the CRU tweak, you are limited to 120hz with Gsync enabled.

CRU settings change I use is in the extended block to change 120 to 144 in the HDMI 2.1 and freesync section. Don't know if this new driver has introduced something else that needs to be changed as well.... This is on a 5090 GPU in case thatr makes any difference

Even reverting the setting in GRU does not help, only a driver reinstall enables gsync to work for any resolution again. Went back to 576.80 and it all works fine. 144hz with Gsync enabled with no issue. Only updated my driver to finally be able to play control with ray tracing on, but no crashes. Nvidia giving with one hand and taking away with another...

When I say span out I mean it slows down, locks up completely, with even the mouse crawling across the screen. That is if you are luck enough for the screen to sync with the display and give a picture. Obviously sample size of one, so would be interested to hear if anyone is having the same issue, or not.