CAC-1085 allow [email protected] with 4:4:4 ?

65 on 30-06-2020

Hi All,

Does the CAC-1085 allow [email protected] with 4:4:4 ? or does it  have to be 4:4:2?

 
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12 on 02-07-2020

It should allow up to 4K 144 Hz HDR 10-bit YCbCr444 and RGB, if not 12-bit. You can already do 4K 120 Hz SDR 8-bit YbCr420 on HDMI 2.0 if the TV supports it.

on 02-07-2020

Sorry, I meant the above is the limit of HDMI 2.1. The DisplayPort 1.4 output on current GPUs without DSC can do 4K 120 Hz HDR 8-bit with dithering YCbCr444 / RGB, or 4K 120 Hz / 144 Hz HDR 10-bit YCbCr422.

on 02-07-2020

No i have a 2080ti, so it will be using DSC, can the CAC-1085 transport [email protected] 4:4:4?

 

on 02-07-2020
No i have a 2080ti, so it will be using DSC, can the CAC-1085 transport [email protected] 4:4:4?From Pittyh

I don’t see why not. Current DisplayPort 1.4 4K HDR monitors without DSC can already do 4K 120 Hz HDR at 8-bit with dithering YCbCr444 / RGB.

on 02-07-2020
I don’t see why not. Current DisplayPort 1.4 4K HDR monitors without DSC can already do 4K 120 Hz HDR at 8-bit  YCbCr444 / RGB.From Monstieur

With DSC, the adapter may be able to do 10-bit.

on 02-07-2020

No i have a 2080ti, so it will be using DSC, can the CAC-1085 transport [email protected] 4:4:4?

From Pittyh

With DSC, the 2080ti should be able to output [email protected] 4:4:4 (and more), but you need to make sure your display device also supports DSC. For example, the 2020 LGs don’t support DSC, while the 2020 Samsung TVs with HDMI 2.1 do.

on 02-07-2020

Pretty sure any tv with a hdmi 2.1 port would support DSC, i have a LG C9

on 02-07-2020

Nope, DSC is an optional feature in HDMI 2.1. Vincent Teoh did a video where he looked at the EDID of a C9, and it had no mention of inputs taking DSC, where as a Samsung Q80T did. Scroll to ~15:15.

on 02-07-2020

With DSC, the 2080ti should be able to output [email protected] 4:4:4 (and more), but you need to make sure your display device also supports DSC. For example, the 2020 LGs don’t support DSC, while the 2020 Samsung TVs with HDMI 2.1 do.

From frisbfreek

It does not need DSC to output 4K 120 Hz HDR 8-bit with dithering RGB / YCbCr444. There’s no need for 10-bit and DSC for HDR.

on 02-07-2020

HDR requires 10 bit.

on 02-07-2020

HDR requires 10 bit.

From Pittyh

No it doesn’t. Consoles and Blu-ray players which output subsampled YCbCr420 need 10-bit to prevent banding. A YCbCr444 / RGB source with full colour sampling can perform dithering at 8-bit and surpass the perceived banding of even 10-bit. That’s why you can run HDR 8-bit RGB / YCbCr444 on a PC which is vastly superior to subsampled 10-bit in games and text.

on 03-07-2020

Correct me if I am wrong, but shouldn’t DSC be only required between GPU and adapter?

The way I see it, to convert DP 1.4 to HDMI 2.1 signal you need more bandwidth than DP 1.4 can deliver in some cases, hence the need for DSC. From adapter to TV HDMI 2.1 should have enough bandwidth.

on 04-07-2020

I don’t think the adapter is acting as a converter but rather a passthrough of DSC-compressed signal. Otherwise it wouldn’t be able to obtain 8k @ 60hz, as that resolution and framerate can’t be obtained with an uncompressed signal over HDMI 2.1.

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0 on 02-07-2020

Some early feedbacks from the first guy to have a hand on the adapter ( with a CX 48 )

 

I quote from Hardforum CX 48 owner thread Page 50 :

Ok – just received and tested stuff for an hour with the CAC-1085 DP1.4 to HDMI2.1 adapter. At this point I CANNOT recommend this product. It’s flawed running on my 2080TI and CX48. This is what i send to Club3d Support:

  • Everytime I change resolution or HDR on/off or change the color profile (bits, chroma or RGC) – the adapter looses signal. Only way to recover is pull the USB Power and put it back in;
  • Even when moving from in game back to windows (disabling HDR) e.g. in RDR2 – it looses signal;
  • When login into windows (switching from lock screen to desktop) it looses signal;
  • HDR increases the brightness of the entire panel;
  • I’m not able to run 4:4:4. Only 4:2:2 or RGB;
  • GSync is NOT supported;
  • Custom Resolution (36840×1600) is NOT supported. Black screen like before;
  • Custom Resolution (3440×1440) at 120 hz 1:1 is supported but only at 8-bit – and NO G-Sync.

Just switched back to HDMI – Text is better readable… there is something wrong with the full RGB / HDR that causes text to be fuzzy.

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9 on 02-07-2020

Thats not a fair review – the CX48 only allows 40Gb of bandwidth is not a full HDMI2.1 specs

Running 4K120Hz at 444 RGB 10Bits goes above the possible resolutions the TV allows. The C9 is allowing 48Gb but the new gen TVs from LG from 2020 are limited to 40Gb

Club3D has tested this with the C9, LG could increase to 48Gb with a firmware update – but thats beyond Club3D ability.  

on 02-07-2020

Good point, but LG CX  with 40 gb, should be sufficient to get 4k 120 8 bits 4.4.4    though ?

on 02-07-2020

at 8Bits thats correct but running with HDR will need 10Bits

on 02-07-2020

Thanks, good to know the 2080ti and LG C9 will work 😀

 

So i can expect to leave my desktop on [email protected] 4:4:4 10 bit HDR  And should not get a lot of switching like this guy?

What do you set your NVidia CPanel to? RGB or 4:4:4 ?

Is [email protected] and 4:4:4 option even available on nvidia cpanel?

Now answer my PM Please i need one !!!!

Haha can’t get one anywhere.

on 02-07-2020

40 Gbps is enough to do 4K 120 Hz HDR 10-bit RGB / YCbCr444, which is a resolution supported by the C9 / CX according to LG. 8-bit should definitely work. Only 12-bit is not supported.

on 02-07-2020

HDR requires 10 bit colour

on 02-07-2020

HDR requires 10 bit colour

From Pittyh

No it doesn’t. Consoles and Blu-ray players which output subsampled YCbCr420 need 10-bit to prevent banding. A YCbCr444 / RGB source with full colour sampling can perform dithering at 8-bit and surpass the perceived banding of even 10-bit. That’s why you can run HDR 8-bit RGB / YCbCr444 on a PC which is vastly superior to subsampled 10-bit in games and text.

This adapter should allow 4K 120 Hz HDR 8-bit with dithering RGB / YCbCr444 on Windows which is satisfactory. Ideally it would allow 10-bit RGB / YCbCr444 so you don’t need to use 8-bit with dithering, but it’s not confirmed yet whether this works on the CX.

on 02-07-2020

Yes HDR requires 10 bit colourspace.

Were talking 16 million colours vs 1 billion colours, you can’t call it HDR if it’s 8bit lol

Bottom line —8-bit video is completely incapable of delivering HDR as it is by default of limited dynamic range, regardless of what special metadata accompanies it. Claiming 8-bit HDR is like boasting 5.1 channel is Atmos Audio. A 10-bit signal is an essential minimum for HDR video, whereas 12-bit buys a ton of headroom and an even greater dynamic range.

on 02-07-2020

Yes HDR requires 10 bit colourspace.

Were talking 16 million colours vs 1 billion colours, you can’t call it HDR if it’s 8bit lol

Bottom line —8-bit video is completely incapable of delivering HDR as it is by default of limited dynamic range, regardless of what special metadata accompanies it. Claiming 8-bit HDR is like boasting 5.1 channel is Atmos Audio. A 10-bit signal is an essential minimum for HDR video, whereas 12-bit buys a ton of headroom and an even greater dynamic range.

From Pittyh

You’ve been misinformed by marketing. All the points you listed are false. They’re “true” only for low quality 4:2:2 or 4:2:0 subsampled signals that Blu-ray players use. You cannot apply dithering to a subsampled signal. A dithered 8-bit signal is visibly superior to a subsampled 10-bit signal – no contest. Banding is equal or superior depending on the dithering quality. Colour resolution is superior, objectively and visibly, in text and graphics.

on 07-07-2020

Displayport 1.4 has a bandwidth of 26Gb, why would this matter at all?

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6 on 02-07-2020

Yeah no, i think you’ve been misinformed

 

https://community.cedia.net/blogs/david-meyer/2018/03/08/8-bit-hdr-video#:~:text=Bottom%20line%20%E2%80%948%2Dbit%20video,boasting%205.1%20channel%20Atmos%20audio.

 

Quoted from David Meyer, Ceo of Cedia

Bio

25 years in the industry, and counting! Worked many facets including home cinema retail, custom integration, and product design and manufacturing. Headed up a CEDIA member company for over a decade, served as volunteer SME (video & HDMI) for all that time, now working full-time for CEDIA focusing on technical research and knowledge development.

• Society of Motion Picture & Television Engineers (SMPTE) Professional member
• Institute of Electrical and Electronics Engineers (IEEE) Professional member

Specialities: Research & interpretation of home technologies, with established speciality in video and connectivity, namely HDR, HDMI interoperability, compliance & bandwidth.

 
 
Ahaha, i think i’ll take his word over some random poster 😛 Sorry.
on 02-07-2020
Ahaha, i think i’ll take his word over some random poster 😛 Sorry.

From Pittyh

He’s talking about 8-bit vs 10-bit in the industry i.e. 8-bit (typically 4:2:0) used for SDR vs 10-bit (4:2:0) used for HDR. This is the context in which those statements are true.

There’s no mention of RGB / YCbCr444 or dithering. An 8-bit RGB / YCbCr444 signal with dithering is superior to any subsampled (4:2:2 or 4:2:0) 10-bit image.

The range of values in a 10-bit signal is irrelevant. Talking about “stops” like a camera is meaningless. How values map to brightness is determined by the PQ EOTF and it’s irrelevant whether it came from a “big number” 10-bit value or a dithered 8-bit signal with alternating “small numbers”.

Number of colours (millions vs billions) is irrelevant. The colour perceived by the eye depends on the effective wavelength emitted by the display. The same wavelength corresponding to a discrete 10-bit value is achieved by a 10-bit signal on a 10-bit panel, a 10-bit signal on an 8-bit + FRC panel, or 8-bit with dithering RGB / YCbCr444 signal on a plain 8-bit panel. The downside to dithering / FRC is the temporal colour resolution is reduced in half, which is 60 Hz on a 120 Hz panel. Movies are 24 Hz, so there is no loss. On the desktop and in games, the eye cannot detect temporal colour change even at 60 Hz. It still displays 120 unique frames per second.

on 02-07-2020

No worries mate, i don’t mean to be rude, but i don’t really care, all i want is windows 10 on my LG C9 running at [email protected] in 4:4:4 or RGB, with HDR on. That’s all i want, it’s not much to ask  is it ? 😛

on 02-07-2020

No worries mate, i don’t mean to be rude, but i don’t really care, all i want is windows 10 on my LG C9 running at [email protected] in 4:4:4 or RGB, with HDR on. That’s all i want, it’s not much to ask  is it ? 😛

From Pittyh

You get HDR on Windows with 4K 120 Hz HDR 8-bit with dithering RGB, which is supported by the adapter, C9, and CX.

We don’t know if 4K 120 Hz HDR 10-bit 4:4:4 / RGB is supported by the adapter / CX at 40 Gbps / C9 at 48 Gbps, because it needs DSC at the DisplayPort 1.4 end, but it is indistinguishable from 8-bit with dithering so it doesn’t matter.

on 02-07-2020

The concept of using dithering to convert an 8-bit signal to something that looks like 10-bit is interesting. However, I don’t think 8-bit + dithering is implemented by any current or planned sources, so isn’t it all of this moot? A better solution, especially now since HDMI 2.1 and DisplayPort 2.0 are around the corner, is to just increase your bitrate by 20% and go 10-bit. I doubt anyone would implement this dithering solution just to work within some old bandwidth constraints.

on 03-07-2020

You get HDR on Windows with 4K 120 Hz HDR 8-bit with dithering RGB, which is supported by the adapter, C9, and CX.

We don’t know if 4K 120 Hz HDR 10-bit 4:4:4 / RGB is supported by the adapter / CX at 40 Gbps / C9 at 48 Gbps, because it needs DSC at the DisplayPort 1.4 end, but it is indistinguishable from 8-bit with dithering so it doesn’t matter.

From Monstieur

Think about this Adapter, it is Displayport 1.4 to HDMI 2.1. Displayport 1.4 is 32Gbps max bandwidth. HDMI 2.1 is 48Gbps max bandwidth. Therefore, the Adapter will always drop down the lowest common denominator to function. Which means it can only do 32Gbps max bandwidth (capped by the Displayport 1.4 spec). 

But still, 32Gbps is enough bandwidth to do 4k 144hz 10-bit 4:4:4 chroma with DSC. Or 4k 120hz 8-bit RGB without DSC. 

 

on 03-07-2020

The concept of using dithering to convert an 8-bit signal to something that looks like 10-bit is interesting. However, I don’t think 8-bit + dithering is implemented by any current or planned sources, so isn’t it all of this moot? A better solution, especially now since HDMI 2.1 and DisplayPort 2.0 are around the corner, is to just increase your bitrate by 20% and go 10-bit. I doubt anyone would implement this dithering solution just to work within some old bandwidth constraints.

From frisbfreek

Windows 10 has supported 8-bit RGB / YCbCr444 with dithering for HDR since the beginning. It automatically uses dithering when running in a full colour sampling mode like RGB / YCbCr444. This is the ideal mode for HDR monitors over DisplayPort 1.4. The banding and colour gamut is indistinguishable from 10-bit YCbCr422, and you get full colour sampling with desktop quality text and graphics. Subsampling looks terrible on the desktop with fringing on everything.

It’s only consoles and Blu-ray players which force you to use 10-bit YCbCr420 for HDR.

Dithering cannot be applied to a colour sub-sampled signal, which is why you can’t get HDR at 4K 120 Hz 8-bit with dithering YCbCr420 on HDMI 2.0 on the CX. However you can do HDR at 4K 60 Hz 8-bit with dithering RGB instead of dropping down to 10-bit YCbCr422.

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0 on 04-07-2020

Does this adapter work at 4k/120/444/8bit using a graphics card without DSC (a 1080TI connected to a LG C9)? This should be within the limit of DP1.4 without DSC.
If not, would 2560×1440/120/444/8bit or 10bit work?

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5 on 04-07-2020

Max 10bit 444 98hz.

on 05-07-2020

Max of what? the CX or the C9?

 

This is all very confusing, even the Club3d guys can’t give a  straight answer.

 

Can i do [email protected] Hz with 4:4:4 HDR/10Bit on my 2080ti and lg C9 with the cac-1085?

It’s a pretty straightforward question, but everyone seems to give different answers.

on 05-07-2020

If you want 10 bit 444, it’s going to be 98hz. 4k 120 will be 8 bit.

on 05-07-2020

@Pittyh assuming your C9 doesn’t have DSC, you cannot do 4K @ 120hz 4:4:4 10-bit because that is beyond the bandwidth of DisplayPort 1.4. From what @Monstieur said, your best option within your bandwidth constraints is to use 8-bit + dithering, as this has the least impact on perceived quality (although I don’t know how to enable it exactly).

If your C9 has DSC then great you should be good to go, but the research so far suggests that it doesn’t. You might want to reach out to LG if you want a definitive answer.

on 05-07-2020

Ok Cheers

 

Guess i will have to wait til the 3080 to unlock the full potential of the tv. I will still get the club3d cable though, because 8bit [email protected] will still be good. 😀

on 05-07-2020

For me 98hz is worth it, trust.

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9 on 05-07-2020

4K @ 120hz 10 bit color uncompressed signal is supposed to be 32.27 Gbit/s

Display Port 1.4 max bandwidth is supposed to be 32.40 Gbit/s using HBR3 (High Bit Rate 3)

So it looks like it fits within the limit, but just…

I don’t know if those limits include data rates or just listing max transmission rates.

on 05-07-2020

Nope, you’re not factoring in the 8/10 encoding rate in DisplayPort 1.4. This means that it uses 10-bits to transmit 8-bits of data. So your 32.4 Gbps max bandwidth turns into a 25.9 Gbps max *data rate*. This encoding is also separate from any blanking overheads.

on 05-07-2020

I’ve actually worked on a Wasabi mango 4k 120. Those are the limitations.

on 05-07-2020

But also if you look at the product page it states:

This product is SPECIFICALLY designed to work with the latest Graphics Processing Units (GPU’s) which supports DSC 1.2

 

and

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 

** Please update your Graphic drivers on your PC and make sure that DSC1.2 is supported on your devices to support the these resolutions/refresh rates!

 

And on the nvidia 20 series wiki:

DisplayPort 1.4a with Display Stream Compression (DSC) 1.2

on 05-07-2020

So [email protected] with 4:4:4 HDR using DSC fits within the 25.92 limit. So does 4:2:2 

Only 20 series nvidia cards have DisplayPort 1.4a with Display Stream Compression (DSC) 1.2

Yep that’s exactly what happens, i’ve worked it out

Nvidia display port 1.4 HBR3 = 32.27gbit/s but with DSC -> fits in HBR3 25.92Gbit/s -> adapter then converts this 25.92Gbit/s signal to HDMI 2.1

 

So it’s your choice use 4:2:2 which disables DSC, and you get chroma subsampling (bad for pc text)

Or set 4:4:4/RGB and DSC kicks in and will compress the 32.27 to fit within the 25.92 limit.

They are both the same bandwidth and will fit into 25.92 – the max data output of dp1.4

 

Look at the dp1.4 HDR Video with Compressions table on wiki https://en.wikipedia.org/wiki/DisplayPort

 

on 05-07-2020

@Pittyh, I’m not sure what your point is? The adapter will convert a DP 1.4 signal to an HDMI 2.1 signal; this signal can be uncompressed or use DSC. However, DSC won’t be used unless both your source can do DSC compression and your display can do DSC decompression. The adapter does NOT convert a DSC stream into an uncompressed stream.

If either your source or your display can’t do DSC, then you’re limited to 4K @ 120hz 4:4:4 8-bit for an uncompressed signal (and the limitation is on the DP 1.4 side).

If BOTH your source and display can do DSC, then you should be able to get higher resolutions/framerates/color depth, as DSC can do ~3:1 compression ratio. 8K @ 60hz is roughly 2x the data rate of 4K @ 120hz, so that’s possible, but only with DSC.

You stated you have a C9, so your display likely doesn’t support DSC.

on 05-07-2020
The adapter does NOT convert a DSC stream into an uncompressed stream.From frisbfreek

Are you sure about that? product page says “With its DP1.4 DSC video compression technology, this adapter is able to convert DP1.4 video signals to HDMI™2.1”

 

Sounds to me exactly like what it is doing.

 

on 05-07-2020

It supports DSC compression in the DP 1.4 stream input and HDMI 2.1 output, but it’s not claiming that it does the decompression.

Think about it: if it were converting DSC to non-DSC, it wouldn’t be able to support 8K @ 60hz. That resolution and framerate requires 49.6 Gbps uncompressed, but HDMI 2.1 only supports a 42.67 Gbps data rate. So how would it be possible?

FYI, here’s a data rate calculator in case you need it:

https://tomverbeure.github.io/video_timings_calculator

on 07-07-2020

Amazon question about product.

Does this require a tv/screen that supports dsc, or is that just required for the source?

No it does not require the screen to support DSC the adapter will work as a decoder or bypass when the source is supporting it .

 

Interesting, still very vague though 😛

on 07-07-2020

Also i sent an email to club3d and got this response:

 

Hi can you please clarify some details regarding the CAC-1085?

If I have a 2080ti and a LG C9

Can I enable [email protected] hz with 4:4:4 Colour and 10bit HDR?

Or is it 8bit?

Does the adapter take the DP1.4a DSC signal and uncompress it to hdmi2.1?

So 25.92 Gbit/s signal from the video card to the adapter, uncompress then convert to 32.27Gbit/s hdmi2.1 from the adapter to the HDMI2.1 port?

There is a lot of talk and confusion going around, some clarification would be great 

Regards,

—————————
Hi ****,

Yes the adapter is able to support [email protected] with 444 and 10Bit
The adapter is able to Bypass and Decode
It does note Encode DSC Compression

With the LG C9 the support for 48Gbps full HDMI is there. Please note that newer LG TV from 2020 does not support fully the 48Gbps but only 40Gbps so limitations might be on the supported devices.

We hope this answer your questions.

Best regards

Club3D Support

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0 on 05-07-2020

I’m guessing it has something to do with this from wiki

 

 Only a portion of DisplayPort’s bandwidth is used for carrying video data. DisplayPort versions 1.0–1.4a use 8b/10b encoding, which means that 80% of the bits transmitted across the link represent data, and the other 20% are used for encoding purposes. The maximum bandwidth of RBR, HBR, HBR2, and HBR3 (6.48, 10.8, 21.6, and 32.4 Gbit/s) therefore transport video data at rates of 5.184, 8.64, 17.28, and 25.92 Gbit/s

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1 on 05-07-2020

Good news for NVidia 1080TI and LG C9 with this adapter: Somebody on avsforums tried this combination (https://www.avsforum.com/forum/40-oled-technology-flat-panels-general/3123168-2019-lg-c9a-e9-dedicated-gaming-thread-consoles-pc-37.html#post59892538)

And was able to get up to 4k/120Hz/422/10bit. So 120Hz HDR is finally possible, even with an older 1080TI! Altough with reduced 422 color space.

on 07-07-2020

I was hoping this would convert the DSC and not use it passively (which is useless for us C9/CX owners) Oh well 4k/120Hz/422/10bit/HDR or 4k/120Hz/444/8bit/HDR dithering will have to do for now. Good to know that 422 works though, I’ve been worried it wouldn’t work because at 4k the TV won’t accept 420.

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2 on 05-07-2020

here is the amazon link, available in one week.  it was available to order june the 26th but went out of stock so fast that i missed it ….

https://www.amazon.com/Club-3D-DisplayPort1-4-4K120Hz-CAC-1085/dp/B08BX49V5V?fbclid=IwAR1eYMgpaL6y9zU-OI9rxQy-bli6sZPt-R8Kx-yoVZZojrKjad6YB1Qt04M

on 10-07-2020

Hmm it’s now unavailable with no planned stock date. Hope they didn’t find a critical flaw!

on 11-07-2020
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0 on 10-07-2020

Yep, this dude confirmed it.

https://imgur.com/oYhcYJq

 

12bit [email protected] thx for coming 😀

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8 on 12-07-2020

So my CAC-1085 arrived today. I’m currently using it with a RTX 2080Ti and a LG 55″ SM9000 Nanocell TV (the one equipped with four full bandwidth 48Gbps HDMI 2.1 sockets which also uses the Alpha 7 gen 2 processor – same as the B9 OLED).

The adapter feels very much like a prototype rather than a finished product. I can get 4K 120hz + 8-bit or 10-bit Full RGB color. I can only do 4K 120hz + 12-bit with 4:2:2 chroma sampling. I prefer 4K 120hz 10-bit Full RGB. It seems to give the clearest text and most vibrant colors. There is also no ghosting or motion blurring @ 4K 120hz which is really nice.

The adapter does not support G-sync or Freesync but it does support bog standard V-sync to prevent tearing.

The one huge caveat to this adapter is that its handshake between the graphics card, adapter and TV seems to be very brittle. And what I mean by that is, whenever I switch between HDR to SDR or vice versa, the screen will go black and stay black until I pull the USB power cord out of the adapter and put it back in again.

The same thing happens after I close down a game when i’m finished playing it. The transition from game screen to the desktop screen once again turns the screen black until I power down the adapter and switch it back on again.

It’s really annoying to have to keep on powering it off and on but when it’s working, everything looks so good.

FYI, I’m using a 48Gbps Belkin HDMI 2.1 (2m) cable to connect.

Another thing I noticed is that in SDR mode, I only need to set the TV’s colour setting to 50. But in HDR mode, colours look very washed out until I turn the TV’s colour setting up to 80-85 so that colours pop as much as they do in SDR mode.

For those LG SM9000/B9/C9/CX users out there, in the Picture Settings, I’m using Game Mode and all 4 HDMI sockets have HDMI Ultra HD Deep Color turned on. In the Input Home Dashboard I’ve also edited the HDMI socket hooked up to the Club3D Adapter/GPU to ‘PC Input’.

on 13-07-2020

Why are you switching between HDR and SD? can’t you just turn on HDR in windows and leave it on?

 

 

on 13-07-2020

Why are you switching between HDR and SD? can’t you just turn on HDR in windows and leave it on?

 

 

From Pittyh

If i’m in SDR and i turn on HDR in windows 10, the screen goes black. So i have to pull out the adapter’s power cable and put it back in again to get a picture on the screen. If I don’t do that, the screen stays black. The trouble is, many PC games do not support HDR. So then the game will automatically switch to SDR. Then that causes a black screen. And once again i have to unplug the adapter’s power cable and pop it back in again to get the screen to come back on.

The CAC-1085 feels very much like an unfinished prototype. I REALLY hates switching from HDR to SDR or from game to desktop (and vice versa).

on 13-07-2020

How did you get 4k120hz RGB 10Bbit? I assume 444?

on 13-07-2020
How did you get 4k120hz RGB 10Bbit? I assume 444?From net200777

No. The adapter is offering me 4k 120hz Full RGB @ 8-bit, 4K 120hz Full RGB @ 10-bit or 4k 120hz 4:2:2 Limited @ 8-bit/10-bit/12-bit. There is no 4:4:4 option and no 4:2:0 option.

But no matter which of those settings i choose, the damn thing is always losing signal and I am forced pull out the adapter’s USB power cable and plug it back in again to get an image back onto the screen. 

on 13-07-2020

If you can get full rgb, you can also get 4.4.4 . ( this is the same, only that one is converted live )    SDR 10bits 4k 120 full rgb 444 is really good and I cant wait to receive my adapter.

Question for the owners,

Do you notice a difference in mouse lag / input lag switching from 1440p 120Hz   and 4k 120hz ?

Thanks!

on 13-07-2020

Has anyone been successful setting a custom resolution? Specifically 4k 96-98hz 10bit 444?? It won’t accept it for me.

on 13-07-2020

If you can get full rgb, you can also get 4.4.4 . ( this is the same, only that one is converted live )    SDR 10bits 4k 120 full rgb 444 is really good and I cant wait to receive my adapter.

Question for the owners,

Do you notice a difference in mouse lag / input lag switching from 1440p 120Hz   and 4k 120hz ?

Thanks!

From BricoDepot1987

The adapter is absolute garbage. It is constantly losing signal and giving me a black screen whenever i try to change any resolution settings in video game graphics menus. Sometimes I have to restart my PC just to get an image back on the screen. The CAC-1085 is a very flawed device and I wouldn’t be surprised if Club3D has to recall them all.

on 14-07-2020

The adapter is absolute garbage. It is constantly losing signal and giving me a black screen whenever i try to change any resolution settings in video game graphics menus. Sometimes I have to restart my PC just to get an image back on the screen. The CAC-1085 is a very flawed device and I wouldn’t be surprised if Club3D has to recall them all.

From Ravenmaster

1.That has nothing to do with BricoDepot1987´s comment.
2. Club3d is designing Cabels and adapters to bring a signal from A to B, every issue that you have is caused by the software of A and B. The fact that you need to restart your PC instead the adapter is the proof.

3. Wait for software updates of A and B cant be so hard, right? So lets chill…

4. It is summer , so go outside and watch some ti..

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0 on 19-07-2020

So After trying the CAC 1085 with C9 and SM9000,it works,

I can get 4k 120 full rgb 12 bits,

But since I dont care about changing from hdr to non hdr or switching resolutions, I dont have the issue that Raven is mentioning.

I keep my tv at 4k sdr at all time. ( Hdr is really overrated imo, it adds input lag and destroy the color accuracy anyway  )

I was happy to find that the input lag at 4k 120 on the sm9000 is about 7 ms,  which is better than the c9 / cX that will get you 11 ms.

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