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

Updated on 23-06-2023 in DisplayPort 1.4 to 4K120Hz HDMI Adapter.

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5 0 on 16-01-2023

Lisandro

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.

1 0 on 16-01-2023

Lisandro

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.

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Baak

What happens when you disconnect the AOC display?

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

0 0 on 17-01-2023

Lisandro

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 0 on 28-01-2023

joevt

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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0 0 on 08-04-2023

orlendo777

I use a CAC-1087 but i m not able to get 4k120Hz working. Above 1080p the limit is 60Hz that the adapter is able to put to the TV.

Setup: Windows 11 on AMD Ryzen Threadripper 3970x > ASUS ROG ZENITH II EXTREME > Nvidia RTX A4000 (Output:DisplayPort) > CLUB 3D CAC-1087 > LG OLED42C24LA (Input: HDMI)

How on earth do these Adapters behave so different?
I tried the settings above… no chance to get 4K120Hz signal on the TV.

Superstrange:
If i add a CAC-1085 on another DisplayPort on the RTX A4000 and connect it to another HDMI Input (E.g. HDMI 2) of the TV, then the following setup works:
Clone the Display 1 and 2 via Nvidia Control Panel, set Display 2 (E.g CAC-1085) as primary and resolution to 4K120Hz then the TV is able to get Input Signal also on HDMI 1 (via CAC-1087). As soon as i remove the CAC-1085 everything drops back to only 4K60Hz possible.

Will a Firmwar Update of the CAC-1087 help me to use only the CAC-1087 with 4K120Hz?

Kind regards
Orlando

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