DisplayPort 1.4 to HDMI 4K120Hz (ie, hdmi 2.1) is "out"

zurv

Limp Gawd
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May 2, 2008
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195
https://www.club-3d.com/en/detail/2496/displayport_1.4_to_hdmi_4k120hz_hdr_active_adapter_m-f/

I'm really looking forward to getting this. (it doesn't seem to be on sale yet.)

I'm connecting my HT PC (kingpin 2080ti SLI) to LG c9 77"

NEW Club 3D DisplayPort 1.4 to HDMI 4K120Hz HDR Active Adapter M/F
The Club 3D CAC-1085 is the perfect solution to connect to any HDMI 4K120Hz ready displays. If you have a DisplayPort 1.4 ready PC or any other device that lacks the new HDMI 4K120Hz specification, the Club3D CAC-1085 will be the simple way to upgrade your device and connect to your new TV.
With its DP1.4 DSC video compression technology, this adapter is able to convert DP1.4 video signals to HDMI 2.1, supporting video display resolutions up to 8K (7680 x 4320)@60Hz and creating life like colors and movements with HDR giving users the ultimate visual experience. The Adapter is powered thru an USB Type C to USB Type A cable (provided with the product).

Features:
  • Compliant with VESA DisplayPort v1.4 Specification
  • Compliant with HDMI v2.1 Specification
  • Support HDCP 1.4 and HDCP2.2
  • Support DSC v1.2a and backward compatible with the former version
  • Support Max. resolution/refresh rates up to 4k@120Hz
  • Support Dynamic HDR
  • Sound Support 5.1-7.1
Applications:
  • For the host device like laptop, desktop, video converter adaptor, docking station, projector, gaming and display system like TV, digital signage, VR/AR system.
  • Perfect for Host Devices which are featured with the DP1.4 graphic card that supports DP video signal output for gaming, commercial applications.
Supported resolutions:
  • Support Max. resolution/timing up to 4k@120Hz
  • OS Support: All
This product is SPECIFICALLY designed to work with the latest Graphics Processing Units (GPU's) which supports DSC 1.2:
At the time of printing, these are the supported GPUs.:
  • AMD NAVI: RX5700, RX5600XT, RX5700XT, RADEON VII, RX5500XT.
  • NVIDIA TURING RTX : TITAN RTX, RTX 2080, RTX 2070, RTX 2060
  • QUADRO : RTX8000, RTX6000, RTX5000, RTX4000, RTX3000 MOBILE
  • Intel Gen11 based: Ice Lake, Iris Plus Graphics, UHD Graphics
 
Last edited:

frisbfreek

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Jul 13, 2004
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53
I'm curious if this also allows existing graphics solutions to drive 8k (TVs) @ 60hz using DSC. Even Ice Lake's Iris Plus G7 graphics supposedly supports DSC and up to 8K resolution -- it wouldn't be for gaming, but maybe for productivity.
 

zurv

Limp Gawd
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May 2, 2008
Messages
195
I'd rather take 120fps than gysnc at 60hz. It isn't like i'm not upgrading in sept... so something to hold me over till then. Now the issue is that is isn't really out :( ie, no place has it for sale yet.
 

CajunAzn

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Sep 8, 2014
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Dead on Arrival
There is a small window between now and when Ampere/RDNA2 cards launch that this will be viable.

Honestly, I want to enjoy 4K120 444 on my OLED bad enough, I'm thinking of getting this as soon as it hits Amazon. Might also use it to hold me over until the GFX card prices drop down from ridiculous from pent-up demand.
 

MistaSparkul

[H]ard|Gawd
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Messages
1,297
I'd rather take 120fps than gysnc at 60hz. It isn't like i'm not upgrading in sept... so something to hold me over till then. Now the issue is that is isn't really out :( ie, no place has it for sale yet.
I'd rather take 120Hz at 4:2:0 chroma WITH VRR on a LG OLED than use this thing just to get 120Hz 444 chroma with NO VRR. Having no VRR is going to be a way more negative impact to gaming vs having 420 chroma.
 

CajunAzn

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Sep 8, 2014
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I'd rather take 120Hz at 4:2:0 chroma WITH VRR on a LG OLED
That's still a CX only feature, while a lot of us are sticking with the C9.

(AVSForum)
"...further into 2020..., or never...
- support for 4K/120Hz 8-bit SDR 4:2:0 via HDMI 2.0 - It is not known if it will be enabled for C9;"


And even if it had it, text looks like ass, colors are all off...that's not why I bought an OLED lol.
 

MistaSparkul

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That's still a CX only feature, while a lot of us are sticking with the C9.

(AVSForum)
"...further into 2020..., or never...
- support for 4K/120Hz 8-bit SDR 4:2:0 via HDMI 2.0 - It is not known if it will be enabled for C9;"


And even if it had it, text looks like ass, colors are all off...that's not why I bought an OLED lol.
C9 owners, guess that makes sense. Although we are only a few months away from Ampere so really this product is simply too late. And 444 chroma is only going to make a major difference in desktop use. In games chroma subsampling is a lot harder to notice.
 

Seyumi

Limp Gawd
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Mar 30, 2011
Messages
242
Too bad no VRR. I'd rather take 4k 60hz VRR over 4k 120hz non-VRR. I'd only do it if I can maintain 4k 120hz mininum 24/7. Sometimes I can't even pull 4K 60hz minimum (on most modern games with max settings) even with a 2x2080Ti.
 

kasakka

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Aug 25, 2008
Messages
1,676
This is now listed in my country for 63 euros inc 24% VAT, availability estimated for end of the month.

I have a LG CX 48" coming hopefully next week and I am considering this adapter as it would be nice to use 4K 120 Hz everywhere. Which 30xx series Nvidia GPUs get released in September, when they are available in stores (and how bad is the stock situation) and how they perform is a complete mystery at this point so this would give me more time on my 2080 Ti so I can wait for the full lineup and maybe some sales.

Lack of VRR is a bummer but not a deal breaker for me at least. From the forum thread linked above there is also this quote:
Hello ! End of June is the expected release date – no VRR no Gsync no Freesync on this first batch .. it might be possible to upgrade with a firmware support in the future but no guarantee there.
The device is powered with USB so it might be possible to do a firmware update that way too.
 

gamerk2

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There is a small window between now and when Ampere/RDNA2 cards launch that this will be viable.

Honestly, I want to enjoy 4K120 444 on my OLED bad enough, I'm thinking of getting this as soon as it hits Amazon. Might also use it to hold me over until the GFX card prices drop down from ridiculous from pent-up demand.
Keep in mind, current NVIDIA card's don't support 10-bit 444 for "reasons", and it's not known if the 3000 series will address this. So you might have to drop to 422 if you want 4k120.

And yes, many of us are pestering NVIDIA tech support.
 

kasakka

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4K120 444 10bpc would require 32.27Gbps, so DSC would be required over DP1.4 (which is supposed to part of Turing's spec).

Is the 10bit option just greyed out in nvcpl?
The adapter supports DSC so that should be no problem as long as you have an Nvidia 20xx or AMD Navi card.

Due to lack of HDMI 2.1 GPUs what NVCP does is a mystery. It might report 12-bit color and instead output 10 or 8-bit.
 

gamerk2

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4K120 444 10bpc would require 32.27Gbps, so DSC would be required over DP1.4 (which is supposed to part of Turing's spec).

Is the 10bit option just greyed out in nvcpl?
Try doing 1080p 4:4:4; 10-bit is greyed out, and NVIDIA has basically said they only support 8-bit and 12-bit @ 4:4:4, regardless of resolution. [Tested on my B6P; holding off until I get reviews with the 3xxx series].

So there fear is we'll have to drop to 4:2:2, as HDMI 2.1 doesn't have the bandwidth for 4k120 HDR 4:4:4. Some of us are REALLY pestering NVIDIA on this point.
 

frisbfreek

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Jul 13, 2004
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Has anyone heard anything else on this, or seen it in stock? It's near the end of the month, so... :meh:
 

kasakka

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Has anyone heard anything else on this, or seen it in stock? It's near the end of the month, so... :meh:
One of the local dealers still shows 30.6.2020 for availability so let's see in a few days. Hopefully I will also get my LG CX 48" this week.
 

shadowj

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Jan 7, 2016
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305
Would help if I use this cable with my RTX 2080 Ti + Samsung 4k TV Q90R ( 60 Hz / HDMI 2.0 ) over my regular HDMI cable ??
 

Armenius

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Jan 28, 2014
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The Q90R his limited 2.1 functionality on input 4. What exactly it supports is not clearly documented, though. It simply states that "4K 120 Hz" is supported on this input.
 
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