Custom Resolution Utility (CRU)

[bobithtidus]

(02-08-2025 04:37 PM)ToastyX Wrote:  

(02-08-2025 02:06 PM)bobithtidus Wrote:  lg 39gs95qe owner here, been using the CRU and just noticed some odd behavior with the monitor and custom resolutions settings. So I am using the hdmi 2.1 AV connection, able to get 240 hz on 3440x1440 resolution by creating a new DisplayID 1.3 under Extension blocks. Been running with that for awhile including modifying the HDR metadata, but recently I tried out the resolutions that is found in detailed resolutions even made a few custom ones there and found out the image quality is so much better than the extension block DisplayID resolution, so the no brainer is that I should be using Detailed Resolution or the ones from CTA-861 because it gives better image quality in HDR correct? The problem here is that when I tried to modify the hz, it limits my pixel clock to about 655 mhz which means about 122 hz max, whereas in the DisplayID resolution there seems to be no limitations, so what is the deal here? Is this by design because of monitor limitations, if not is there a way that I can bring the picture quality in the DisplayID extension block resolution to be on par with the detailed resolution that is limited by the 655 mhz pixel clock?

Why do you need to add 3440x1440 @ 240 Hz? That's the native resolution of the monitor according to the specs, so it should already be defined by the monitor. What do you mean by image quality? There should be no difference in image quality between DisplayID and EDID detailed resolutions. You are assuming something and coming to the wrong conclusion.

(02-08-2025 02:06 PM)bobithtidus Wrote:  Also under the display drop down box I found a new version, I am currently using GSM780A which is the active profile, but there appears a GSM780B which is a new profile, that may have appeared when I updated the monitor firmware, not sure, but when I enter that profile it showed a new setting under the Detailed resolution section that is greyed out which is - Range limits: 48-240 Hz, 400-400 KHz, 1400 MHZ.
The problem here is that i don't know how to make that profile active, i selected it in the drop down box and use restart64.exe and all it did was revert back to the GSM780A profile, how do I make the GSM780B my active profile?

You don't make a profile active. Active means it's connected, so whatever that is, it's not connected. Maybe that was for DisplayPort if you tried that at some point.

For DSR, and not using the monitor's DSC, I can tell the quality difference between DSC on and off, and the only way to turn off DSC is using 2.1 AV, and I think 240 hz. The reason why i created a custom resolution is to take advantage of DSR and turn off DSC. As for second profile I might try with 1.4 to see what is the deal with that. Also there is certainly difference in HDR, which is the mode I am primarily using, the HDR seems to tone map differently, which is why I am wondering the monitor is doing something cheap like using internal adjustment to downgrade certain things to be able to do 240hz, just like how DSC is a visual downgrade over the full bandwidth.

Edit: So I tried with 1.4 dp, and the same thing showed up the profile drop down box always default to GSM780A and I have not way of activating GSM780B which is the newer version.