Custom Resolution Utility (CRU)

[Huhu3221]

(01-09-2025 07:19 PM)ToastyX Wrote:  

(01-09-2025 05:37 PM)Huhu3221 Wrote:  If I set the refresh rate to for example to 80 Hz it makes no impact. Refresh rate goes up with no restriction. Setting in NVCP also doesnt make a difference.
I have an Nvidia RTX3070Ti Card if it matters.

What are you using to check the refresh rate? Also the NVIDIA control panel has a "Preferred refresh rate" setting in "Manage 3D settings" that can affect the refresh rate in games. It should be set to "Application-controled" to avoid forcing the highest refresh rate.

I use the OSD of the monitor to check the current refresh rate. In the control panel it's set to "Application-controled".

(01-09-2025 05:37 PM)Huhu3221 Wrote:  Edit: maybe I should have said that the monitor performs Low Frame Rate Compensation. I want to disable the LFC through limiting the refresh rate because of vrr flickering. If I only limit the frame rate, in certain circumstances the display raises its refresh rate to double the frame rate.

Unforuntely NVIDIA doesn't provide a way to disable LFC, and NVIDIA handles LFC differently than AMD. If the range is 90-144 Hz, NVIDIA will still use LFC below 72 FPS, while AMD would disable LFC.

I've read this range somewhere on reddit to reuduce the vrr flickering. Maybe the trick is that with this range, the LFC is constantly working and doubles the frames, and you get no flickering.

I think if the refresh rate is locked between for example 40-80 Hz and your Fps won't exceed 40-80 FPS LFC can't double the frames due to limited maximum refreshrate.

My use case is the range from 40-60fps. LFC kicks in at 50fps. With the setting 40 - 100 Hz on HDMI2.1 it will activate at +- 47 FPS, better but not perfect.

I'm a bit confused what refresh rate limits the display actually. The rate set in NVCP does perfectly nothing. 60 Hz or 240 Hz makes no difference for the maximum rate of the display.

Thank you