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***ToastyX*** · 12-22-2025, 08:48 PM

(12-22-2025 06:22 PM)GGoki Wrote: On RTX 5000-series graphics cards with the latest drivers, the native refresh rate no longer appears in CRU.
I’m not sure why this is happening, but I believe it’s an issue with the latest driver. The native refresh rate definitely used to be visible a few months ago.
Even in the case of the MAG401QR, this is not a cutting-edge display, and it is well within the pixel clock limit.
Or it could just be my misunderstanding, or it might only apply to the LS32DG800S.
Either way, I’ll extract the EDID file and share it with you later.

Are you sure it used to be visible for the same monitor? It doesn't make sense for the EDID to change between driver versions. I found a Linux kernel issue for the same monitor where 240 Hz wasn't detected for the same reason because the data block wasn't supported yet, which means it should have always been like that. I will have to add support for that data block at some point.

GGoki · 12-23-2025, 02:45 AM

(12-22-2025 08:48 PM)ToastyX Wrote:
(12-22-2025 06:22 PM)GGoki Wrote: On RTX 5000-series graphics cards with the latest drivers, the native refresh rate no longer appears in CRU.
I’m not sure why this is happening, but I believe it’s an issue with the latest driver. The native refresh rate definitely used to be visible a few months ago.
Even in the case of the MAG401QR, this is not a cutting-edge display, and it is well within the pixel clock limit.
Or it could just be my misunderstanding, or it might only apply to the LS32DG800S.
Either way, I’ll extract the EDID file and share it with you later.
Are you sure it used to be visible for the same monitor? It doesn't make sense for the EDID to change between driver versions. I found a Linux kernel issue for the same monitor where 240 Hz wasn't detected for the same reason because the data block wasn't supported yet, which means it should have always been like that. I will have to add support for that data block at some point.

It seems that only the G80SD is unable to have its EDID read. Sorry for the confusion.
anyways,
here's G80SD EDID

good0127423 · 12-25-2025, 08:46 PM

Hello, I'm going to be straight up here and exclaim that I don't understand what most of the comments here are explaining. For example, I don't really understand what an edid is.

I've got a conferencing TV that doesn't show up as supporting anything more than 4k30 through both HDMI and displayport. The built in OPS (basically a computer that you slide into the TV) is the only thing that has full 4k60 support. I've been able to use CRU to change the detailed resolution to 4k60hz while using displayport (haven't tested HDMI), but recently, it went back to 4k30 (maybe a driver update) and I haven't been able to figure out how to change it back. My preferences seem to change within CRU even after I restart graphics drivers and stuff, but the option for 60hz doesn't appear in windows settings.

Some more things I tried
Inside the CTA-861 extension block, I clicked on TV resolutions and added a 4k60 detailed resolution at the top of the window. Then, I went to TV Resolutions and deleted all the existing 4k resolutions, then added one at 60hz. Under HDMI support, then under HDMI Resolutions, I cannot select 4k at 60hz. It only goes up to 30hz, even after changing Maximum TMDS Clock to 600mhz from 300 (not actually sure what this does unfourtantly)

Am I supposed to change the TV's Device ID to something else? Any other tips? Thank you in advance

***ToastyX*** · Yesterday, 10:09 PM

(12-25-2025 08:46 PM)good0127423 Wrote: Hello, I'm going to be straight up here and exclaim that I don't understand what most of the comments here are explaining. For example, I don't really understand what an edid is.

I've got a conferencing TV that doesn't show up as supporting anything more than 4k30 through both HDMI and displayport. The built in OPS (basically a computer that you slide into the TV) is the only thing that has full 4k60 support. I've been able to use CRU to change the detailed resolution to 4k60hz while using displayport (haven't tested HDMI), but recently, it went back to 4k30 (maybe a driver update) and I haven't been able to figure out how to change it back. My preferences seem to change within CRU even after I restart graphics drivers and stuff, but the option for 60hz doesn't appear in windows settings.

Some more things I tried
Inside the CTA-861 extension block, I clicked on TV resolutions and added a 4k60 detailed resolution at the top of the window. Then, I went to TV Resolutions and deleted all the existing 4k resolutions, then added one at 60hz. Under HDMI support, then under HDMI Resolutions, I cannot select 4k at 60hz. It only goes up to 30hz, even after changing Maximum TMDS Clock to 600mhz from 300 (not actually sure what this does unfourtantly)

Am I supposed to change the TV's Device ID to something else? Any other tips? Thank you in advance

EDID is the information sent by the monitor to the computer to describe its capabilities. CRU lets you edit the EDID and save it as a software override. If a resolution or refresh rate doesn't show up in the Windows display settings, then the graphics driver is rejecting it for some reason, usually because of bandwidth limitations. If it worked before, then something must have changed with the graphics driver, or in DisplayPort's case, a bad cable could be causing it to negotiate a lower rate. 3840x2160 @ 60 Hz would require DisplayPort 1.2 HBR2 (high bit rate 2) or HDMI 2.0. I would need to know the TV and GPU to find out what they support.