Glenwing

Intel UHD 620 HDMI output will likely be limited to 120 Hz on 1080p monitors.

You need to set the output dropdown to DisplayPort to get general information about the DP interface.

https://linustechtips.com/topic/729232-guide-to-display-cables-adapters-v2/?output=DP

I'm aware of that. Radeon graphics cards support up to 6 per card. So four cards are needed. But using MST hubs, as I said, the number of output ports required would be reduced, so the specialized 6-DP-port cards would not be needed, more standard cards become an option.

Depending on the resolution of the displays you may be able to use DisplayPort MST hubs to reduce the number of output ports required.

1. Please do not revive 5-year-old threads. 2. Your information is incorrect. Please see the pinned thread. https://linustechtips.com/topic/729232-guide-to-display-cables-adapters-v2/?output=USBC 3. You can only connect a monitor to a USB-C port if it supports video output. A monitor doesn't work on your laptop because it doesn't support the video output feature, DisplayPort Alternate Mode. It doesn't have anything to do with the USB transport speed being Gen 1 or Gen 2. Again this is covered in the pinned guide. Checking the USB protocol speed of a port only tells you the speed of USB data transfers. It doesn't tell you whether video is supported. A USB port supporting Gen 1 USB transfer may or may not also support DisplayPort passthrough, and a USB port supporting Gen 2 USB transfer also may or may not support DisplayPort passthrough.

Color management will adjust images before transmitting to the monitor to remap colors onto their equilvalent values in the larger gamut, with the assumption that the monitor is set to display the larger gamut. For example, if sRGB red 255 were equivalent to red 245/green 10 in P3 (I don't know what it actually is), and you had images tagged as sRGB in metadata with a P3 profile loaded in Windows, it will convert the RGB values to whatever the closest equivalent value are in P3, based on the ideal representations of each gamut. Then it sends those RGB values to the display. What shows up on the display is up to the monitor, if you don't set it to P3 mode, and all the RGB values have been converted to their P3 equivalents based on your color profile loaded in Windows, then the output will simply be incorrect.

Certain types of devices may draw much higher VA than watts. PC power supplies have active power factor correction which brings down their VA usage to be almost the same as the watts. So the watts will always be the limiting factor for computers, you should ignore VA ratings and just look at maximum power output in watts.

Color space information is not transmitted, generally speaking. It doesn't, you have to tell it what to do manually, through the monitor menu. The full color range is determined by your color space settings and is not affect by the color depth. If you set the display to DCI-P3 gamut, then the 8-bit value 255 for red will correspond to the maximum red intensity defined in the P3 gamut. If you set the display to sRGB mode, then red 255 will correspond to the maximum intensity of red defined in sRGB. Lower color depth will result in few steps between 0 and maximum intensity, so less granularity in selecting colors. But the range (minimum and maximum intensity) of each color is not affected by color depth. The color space setting in the monitor menu controls how the RGB values 0 to 255 are mapped to what output colors.

Not a requirement, but the license is more expensive if you don't want to put HDMI logos everywhere.

ITU-R BT.2020 defines two complete image systems known as 4K UHDTV and 8K UHDTV. Color gamut is one of the parameters defined by the standard for these formats. Color depth is another one. So are resolution and frame rate. None of these are inherently related to each other. Yes, the BT.2020 standard defines the 4K UHDTV format as having either 10 bpc or 12 bpc color depth, and color primaries as defined in Table 3 (which determines the color gamut). But saying that, because the standard specifies 10 bpc color depth, that must mean you can't use the full color gamut without it... Well the standard also specifies 60 Hz refresh rate (or a few other allowed values), why not say "without 60 Hz refresh rate you can't use the full color gamut"? The color depth is just one of the parameters defined by the standard, and color gamut is another one. That's all. That don't have any dependence on each other. If you have one without the other, it just means your system does not meet the definition of 4K UHDTV as per the BT.2020 standard.

For DP it is inherent to the design, for HDMI it isn't. You *can* design a display to disconnect when powered off with HDMI, (and it's commonly done on TVs for whatever reason), but it's very rare on monitors. Whereas on DisplayPort it's intrinsic to the design, the only monitors that don't do this are those that work around the problem by not actually powering down when you press the power button, just cutting the display or backlight instead.

No, the extra pins are unused for HDMI. Some manufacturers leave out the unused pins. The 4 extra pins on the side (around the long blade) will make the adapter unable to mate with most DVI ports on monitors and modern graphics cards. So avoid using an adapter that has those.

Then it must be using DSC

If chroma subsampling (YCbCr 4:2:2 or 4:2:0) isn't being used, then DSC must be active.

As explained in the pinned thread, you need to install the AMD pixel clock patcher to remove an articificial driver restriction first. Then it should work. https://linustechtips.com/topic/729232-guide-to-display-cables-adapters-v2/?output=DVI&input=HDMI

Display Stream Compression

As do I.

https://www.reddit.com/r/Monitors/comments/w646ju/i_recently_purchased_a_1440p_monitor_and_when_i/

This is a 7 year old thread, please do not revive old threads. Start a new thread if you have a new question. If you have a question about cables or adapters, most basic information can be found in the pinned thread already: https://linustechtips.com/topic/729232-guide-to-display-cables-adapters-v2/

8.1 Gbit/s link rate = 32 Gbit/s total bit rate (4 lanes at 8.1 Gbit/s per lane). This is HBR3 speed, which is appropriate for this display.

Right, I'm saying the link you provided doesn't support what you said. In fact it contradicts you. The quote from the website is the one that is correct. The specification does not establish any maximum length for a cable, nor would it make any sense to do so. Signal integrity becomes more difficult at longer lengths and higher speeds, so it's fine if you want to say "15 feet is typically the longest you can find that will handle HDMI 2.1 speeds" but let's not pretend that there are official limits dictated by the specification when there aren't.

Right, which doesn't say anything like what you said.

The specification doesn't say anything like that.

Not cable dependent features.