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Hot!RTX 3090 Ti FTW3 Ultra DisplayPort 1.4 (DSC) Issues

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2024/05/11 20:07:32 (permalink)
Hello, I have a brand new LG Ultra Gear 45inch OLED monitor and it has an option for DisplayPort 1.4 DSC but when I go to use it the monitor disappears from display manager and acts like its not connected. When I switch back to 1.4 (non DSC) it goes back to being detected. This issue is very annoying and from my searching on the internet it looks like its possibly related to a DisplayID thing. As referenced in this post here  

This seems to be very similar to my issue but the DSC option doesn't work at all.

Any ideas? I'd love to utilize my 240 hz haha. Locked at 144hz currently.
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    Sajin
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    Re: RTX 3090 Ti FTW3 Ultra DisplayPort 1.4 (DSC) Issues 2024/05/12 01:05:58 (permalink)
    I'm guessing you already tried this... https://nvidia.custhelp.c...ate-tool-for-displayid
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    HisActions
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    Re: RTX 3090 Ti FTW3 Ultra DisplayPort 1.4 (DSC) Issues 2024/05/12 10:50:18 (permalink)
    Sajin
    I'm guessing you already tried this... 


    Yes I have tried this. It just tells me "the Update is not applicable to the graphics card in my pc." I thought it was going to be my fix but we're back at square one.
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    HisActions
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    Re: RTX 3090 Ti FTW3 Ultra DisplayPort 1.4 (DSC) Issues 2024/05/12 14:13:41 (permalink)
    I have discovered that the GPU can't handle 4 monitors at the same time. I was able to turn on DP 1.4 DSC when I have 3 monitors plugged in. So to keep with my 6 monitor set up I installed another GPU to cover the other 3 monitors. Very odd troubleshooting and I'm glad to have found the solution. This whole time I thought it was a firmware issue of some sort.
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    Cool GTX
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    Re: RTX 3090 Ti FTW3 Ultra DisplayPort 1.4 (DSC) Issues 2024/05/12 15:42:29 (permalink)
    HisActions
    I have discovered that the GPU can't handle 4 monitors at the same time. I was able to turn on DP 1.4 DSC when I have 3 monitors plugged in. So to keep with my 6 monitor set up I installed another GPU to cover the other 3 monitors. Very odd troubleshooting and I'm glad to have found the solution. This whole time I thought it was a firmware issue of some sort.


    Welcome to the EVGA Forums & Congrats on your first Thread
     
    Good to see you got it working
     
    The information, in link below seems to explain the issue you had
     
    NVIDIA Support
    DSC is used in both DisplayPort 1.4+ and HDMI 2.1 standards.
     
    (excerpt)
    • When a display is connected to the GPU and is set to DSC mode, the GPU may use two internal heads to drive the display when the pixel rate needed to drive the display mode exceeds the GPU’s single head limit. This may affect your display topology when using multiple monitors.  For example if two displays with support for DSC are connected to a single GeForce GPU, all 4 internal heads will be utilized and you will not be able to use a third monitor with the GPU at the same time.
    • If the GPU detects that a display supports DSC, DSC mode will be enabled automatically.  Some displays may allow you to disable DSC by changing the communication link from the displays internal settings (eg. changing the DisplayPort mode from Displayport 1.4 to DisplayPort 1.2)     
    • NVIDIA DSR, NVIDIA DLDSR and NVIDIA Image Scaling are not supported when DSC mode is enabled. 
     
     

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