Link Copied
Please see what was said in the link above.
That's an interesting option. However, it should be noted that the motherboard must be able to transmit 10 bpc ("bit") to the back panel connector. That is not self-evident. Please also read here:
community.intel.com/t5/Graphics/No-bpc-10-option-in-Graphics-Command-Center/m-p/1465251#M115090
Display resolution and refresh rate may be limited by the motherboard manufacturer. Please carefully study their specifications. They can be lower than what the Intel processor itself can do. The spec must say something about "30-bit color" or "30 bpp". 10 bpc applies 30 bits per pixel (bpp). In doubt ask the motherboard manufacturer before buying anything.
If you still want to connect a DisplayPort monitor using this method, then this would be an option (although not ideal):
HDMI to DisplayPort 4K120Hz or 8K30Hz M/F Active Adapter
Unfortunately, these circumstances are beyond the control of either Support Technicians or Developers.
I'm not an Intel employee. The following is my personal opinion: Marketing and Project Management want to induce a willingness in consumers to buy. Features are therefore promised. In case of the technology in question, its release is also dependent on certification processes, which the Intel parties involved have little or no influence on. The requirements to meet the VESA Compliance Test Specification (CTS) have recently become increasingly difficult. VESA = Video Electronics Standards Association (https://vesa.org/). The processes for this take ages and no longer correspond to the deadlines that were originally expected by (Intel) Marketing or Project Management. That's why it's unfortunately still the case that Intel Arc graphics cards are offered as: "Designed for DisplayPort 2.0, certification pending VESA CTS Release". So, DisplayPort 2.0 protocol can only be released if VESA approves the matter. And that seems to be delayed.
Nonetheless, the original intent of outputting 10 bpc color depth is not dependent on DisplayPort 2.0. The predecessor DisplayPort 1.4a and all other versions before should support it, as you have read on Wikipedia. In this respect, I am also disappointed that this has not been the case with the Intel DG2/Alchemist graphics cards (without HDR switched on) so far. All Nvidia graphics cards have been able to do this for a very long time. And even older Intel products can do that too. I use a motherboard with an Intel Core i5-10400 with processor integrated Intel UHD630 by myself. This device passes a DisplayPort signal to a Protocol Converter (PCON) on my motherboard, which converts the DisplayPort HBR2 signal into an HDMI 2.0a TMDS signal and transmits it to the back panel HDMI connector. This even works up to 12 bpc color depth. And this despite the fact that UHD630 was introduced in August 2016 (!) and the PCON MCDP2800 in question in July 2018.
Obviously, it is not self-evident that existing functions will be available again with the successor product. Incomprehensible, but that's how it is. It only helps to make all the functions that you need transparent before you buy to avoid bad buys and missing interoperability. With computers, this goes down to the level of the cord. Beyond that it’s true for a wide range of makes and models not only in the computer industry. Sometimes it can also happen that certain functions require license costs that a product decision no longer wanted to pay, especially in consumer electronics distributing content that different organizations want to get paid for. In my view, a worrying trend is that car manufacturers, for example, want to conclude subscription contracts with their customers for existing technology. For instance, your seat heating only will work if you pay for it regularly. Although the hardware is always there. I hope that this way of thinking does not prevail. That would no longer have anything to do with sustainability. And where it leads when someone autocratic thinks letting people to pay for things granted for free in the past, you can see on Twitter…
This is the picture when the ARC graphics card was released, but it turned out that even the most basic 10Bit RGB444 SDR function cannot be provided! !
You shouldn't throw away the Intel card if you already have it. This is a driver issue that I think needs to be prioritised by the Intel graphics team.
I can provide the following information regarding the protocol conversion (HDMI > DisplayPort) with adapters from my knowledge:
- 4K @ 120 Hz RGB 10-bit is too large for DisplayPort 1.4a and does not fit into the available bandwidth of HBR3 signal transmission. This is independent of SDR or HDR.
- 4K @ 120 Hz can only be achieved with the YCbCr 4:2:2 color model. Please note that according to the HDMI specification, YCbCr 4:2:2 must always be transmitted using a 12-bit tunnel. Please test if you can set 4K @ 120 Hz YCbCr 4:2:2 with an Nvidia card if ready to hand. If you select 10 bpc, the output will automatically jump to 12 bpc. But not necessarily the setting shown within the Nvidia Control Panel! This can only be seen using a signal analyzer or within the signal diagnostics of the display if implemented. The bandwidth for this signal is 26.73 Gbps on the HDMI site and consequently 100% on the DisplayPort site for DP1.4a HBR3. If this doesn't work, it could also be cable related.
- The Protocol Converter Club 3D CAC-1335 uses Lontium LT6711GX (HDMI 2.1 FRL5 > DisplayPort 1.4a HBR3)
- According to the specification, this chip supports 10-bit and Display Stream Compression (DSC pass-through). A DSC encoder for signal forwarding to the DisplayPort site is also implemented. Another product with this chip is, for example, the Delock 64213. However, as with the CAC-1335, DSC is not explicitly mentioned there. This property would have to be requested from the adapter manufacturer or asked why their products do not support what the chip manufacturer says that it should.
- I can see CRU in BearBale's screenshot. It would be worth testing what happens when you select the "DSC 1.2a" check box: Enable DSC 1.2a and 10 bpc. At least with an Intel Iris Xe (Tiger Lake launched Q1 2021), the support for "All bpp" must also be set to enable DSC. Furthermore it may be necessary to explicitly allow DSC within the Windows registry. A corresponding transferable guide can be found here. VESA Display Stream Compression (DSC) is part of both standards: DisplayPort 1.4a and HDMI 2.1. It is supported starting with 11th Generation Intel Core Processor Graphics (also known as Tiger Lake) and newer. Don't forget to select an option for "Maximum FRL rate" and "Maximum slices". You can try this:
After the mentioned adjustments in CRU you have to confirm with OK a few times. Then a restart of the graphics driver is necessary. I'd recommend to reboot the computer. - "Output Dynamic Range" within the Nvidia driver: Limited = Output Level 16 - 235, this is normal HDMI video range,
16 being pure black and 235 being pure white. Depending on the signal chain (display engine of the graphics card > protocol converter > cable > display), manual adjustment may be necessary to ensure correct color rendering. This is possible within the Nvidia driver. For Intel devices "Quantization Range" can be chosen as described here: https://www.intel.com/content/www/us/en/support/articles/000029572/graphics.html - I can confirm from a reliable source that the CAC-1335 is at least capable to operate the AMD Radeon RX 7900 XTX to LG 27GL850 display at a resolution of 2560 × 1440 @144Hz RGB 10-bit (68% bandwidth of HBR3 signaling).
Have you carefully checked the URL I provided to you?
The CAC-1335 cable used in the display card of the computer can only work at 8Bit color depth
Club 3D CAC-1335 is connected to RTX3090 display card in 4K 60HZ mode, and it can only work at 8Bit color depth
My monitor is Philips 328P6VUBREB, whether it is using AMD or NVIDIA graphics card, using DP cable can use 4K 60HZ RGB444 10Bit color depth
However, the software "Intel Graphics Control Panel" does not allow users to adjust the color depth from the DP interface. Only the monitor connected with HDMI can be adjusted. Do you know this?
So I bought a CAC-1355, converted Arc A770’s HDMI 2.1 to DP1.4, and then connected it to my screen, but I still can’t use 4K 60HZ RGB444 10Bit color depth
According to the information I know, intel uses the RTD2173 chip on Arc A770&A750LE to convert one of the DP2.0 of the graphics card to HDMI 2.1. This HDMI interface is not native
(Arc a380 is native HDMI 2.1 without any other chip conversion)
If I bought a monitor with HDMI 2.1 interface and used a standard HDMI2.1 cable to connect the monitor to the ARC Arc A770&A750LE graphics card, I couldn’t set the color depth because Intel still couldn’t handle the RTD2173 chip. conversion problem
The entire series of Arc Pro graphics cards only provide mini DP, but the "Intel Graphics Control Panel" does not allow adjusting the color depth from the DP interface, which is a disaster for professional users! !
I think intel is also because of this problem, until today I haven't seen any reseller selling Arc Pro graphics card
Software limitations, hardware bugs, need to wait 12 months to fix
12 months later, the next-generation Arc graphics card was released
Does intel still care about those of us who bought the first generation of arc graphics card users? i don't think so
"Due to current workloads, I would like to let you know it might take up to 12 months to complete. However, it will take time, and it is very unlikely it will be available in the next update"
Just a blank promise that won't come true, a lie! !
