CAC-1087 with Nvidia RTX 2070 Super and LG Oled C2

4 on 16-01-2023

Hi,
I recently bought Club-3D CAC-1087 with the idea to enable 4k 120Hz towards my LC Oled C2 with RTX 2070 Super.

Currently, I am struggling to enable even standard 4k resolution in 60hz to work stably.

TV constantly stops to recognize input via this cable. Once I change specific resolution settings (I can’t make my desktop fit normally), there is a high chance that the TV will lose input via this cable.

Compared with a standard HDMI connection and Club-3D CAC-1087, with Club-3D CAC-1087, it seems that the TV cannot receive a full 4k signal.
Has anyone been able to make this or similar setup work in a stable manner supporting 4k 120Hz? Any configuration tips, driver versions, etc.  

Appreciate any help here.

 
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1 on 16-01-2023

I tried following settings, and as long as LG HDMI Deep Color is set to 4k, the TV just doesn’t recognize input from Graphics Card.

on 17-01-2023

What happens when you disconnect the AOC display?

Also disable Gsync if you haven’t tried that yet.

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0 on 17-01-2023


So, after around 6 hours of testing and dancing, the above settings started work, and I have stable 4K 120Hz with HDR. 
Also, disabled G-Sync both from a TV perspective and Graphics Card Perspective. I think it could have been causing some of the issues with the compatibility since the cable doesn’t support G-Sync.

The question is, should 4:2:2 subsampling work is still up in the air but will continue testing and post updates.

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0 on 28-01-2023

The current crop of HDMI 2.1 adapters only support 4K120 or maybe 8K30 or 8K60 4:2:0 and don’t support VRR. If an adapter supports 8K60 then it should report support for 4K240.

The PS196 is a newer DisplayPort to HDMI 2.1 protocol converter chip from Parade. I think it supports VRR and 8K60. I don’t know if you can buy an adapter that uses that chip yet.
https://www.paradetech.com/products/ps196/
The PS196 specs say it supports DisplayPort 2.0 but it appears to be limited to HBR3 link rate which is the max for DisplayPort 1.4 so I don’t know what features DisplayPort 2.0 adds for adapters made with this chip.

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