Custom Resolution Utility (CRU)

[ToastyX]

(03-12-2025 11:06 AM)Ezzelin Wrote:  Hello! I've got a PC CRT monitor that I have hooked up to an Nvidia GPU through a Tendak HDMI to VGA adapter on Windows 11. The adapter works fine, and I've defined a custom resolution in the Nvidia Control Panel before successfully, but now I'm trying to get 640x480 to work. As it didn't show up in the resolution picker, I first tried defining it in the Nvidia Control Panel, and it tested successfully, but then when switching to the resolution later it would be a different timing that would be too narrow and beyond the ability to widen on the CRT. I then discovered CRU and decided to try and define the resolution there, but regardless of what I do in CRU it doesn't seem to be defining any new resolutions or changing anything in the Nvidia Control Panel resolution picker. For that matter, the custom resolution that I previously definied in the Nvidia Control Panel isn't showing up in CRU either. I've tried rebooting multiple times and using the restart64.exe utility, but nothing is changing. Is there something I'm missing here? I would love to define a 640x480 mode using custom timing and have it stick. Thank you!

Windows does not list resolutions below 800x600 in the display settings. You have to go to display settings > advanced display settings > display adapter properties > list all modes, which will list 640x480 but nothing below that. CRU only shows what's in the EDID. NVIDIA control panel custom resolutions are completely separate. Also HDMI requires a pixel clock of at least 25 MHz, but I'm not sure if NVIDIA enforces that.