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Author Topic: Can I get UHD (3840x2160p) @60Hz with full 8bit color (RGB/4:4:4) on HDMI2.0?  (Read 15776 times)

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RuudtTopic starter

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With the latest release of UHD (3840x2160p) TVs, we get some questions about the support on HDMI2.0.
And especially about the support for full color in UHD (3840x2160p) at 60Hz.

The first gfx cards supporting HDMI2.0 are the Nvidia GTX 970 and GTX 980 cards.
These cards support UHD (3840x2160p) @60Hz refresh rate with full color (RGB or YCbCr-4:4:4) if your display are able to support it.

Some TVs support UHD @ 60Hz but with reduced color information (e.g. YCbCr 4:2:0) (Usually 24/30Hz full color is supported)
Some TVs support UHD (3840x2160p) @60Hz refresh rate with full color (RGB or YCbCr-4:4:4) but only on one HDMI2.0 port.
And some manufacturers don't document the capabilities very clearly.

So what should we do to view full color UHD @60Hz over HDMI2.0  on a UHD TV?
1.)   Check the TV manufacturer’s website if there is a newer firmware for your TV available.
2.)   Check  the TV manual which HDMI port(s) can support UHD RGB/4:4:4 @ 60Hz.
3.)   Check the TV manual (Samsung and LG) to see if there is a setting called "HDMI UHD (deep)Color", and set it to "On" .
       Check the TV manual (Toshiba) to see if there is a setting called "HDMI Input Mode" and set it to "Mode1".
       Check the TV Manual (Panasonic) to see if there is a setting called "HDMI Auto Setting" and set it "Mode2".
4.)   Install the (Nvidia) gfx drivers and in the driver control panel setup the resolution to 3840x2180p @ 60Hz
5.)   If you want to check if the color is reduced or not? Just open the http://i3.minus.com/ibyJcwdIniHUEs.png (100% zoom) and if you can read 4:4:4  clearly then the colors are not reduced.

P.S.,
Most TV manufacturers recommend using Hi-speed HDMI cables and preferably shorter than 3 meters (some say 5m).

P.P.S.,
I attached extracts from UHD TV manuals, where you can see the different UHD color information from some manufacturers.

P.P.P.S.,
DisplayPort v1.2 also supports UHD (3840x2160p) @60Hz refresh rate with full color (RGB) but most TVs don't have DP ports (I have only seen Panasonic offering DP1.2) .
In some UHD TVs and Monitors you need to enable "Multi-stream" in the TV/Monitor settings menu to enjoy 60Hz UHD.
I haven't come across any UHD monitors with HDMI2.0 yet.
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RuudtTopic starter

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Since HDMI2.0 gfx cards and UHD TVs are quite new, apparently some TVs might not work with PC hardware 100% yet.
Some TV firmware still have some bugs, therefore it's wise to contact the TV manufacturer as well.
Apparently with some Samsung TVs you also need to rename the input to "PC" or "PC DVI" to get full color support.

You can read more info and user experience in these forums:
https://forums.geforce.com/default/topic/777438/geforce-900-series/gtx-980-and-samsung-4k-tv-hu8550-60hz-works-but-not-getting-4-4-4-full-rgb-output/

https://forums.geforce.com/default/topic/778627/uhd-tvs-providing-4k-60hz-with-4-4-4-choma-hdmi-2-0-/

http://www.avsforum.com/forum/166-lcd-flat-panel-displays/1698761-tv-s-capable-4k-60hz-4-4-4-pc-nvidia-900-series-gpu.html

http://hardforum.com/showthread.php?t=1837209

Another test picture to test color reduction:
http://cdn.avsforum.com/b/b4/b4a44044_vbattach208609.png
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johnpaulthomason

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I've got a Vizio Model D 58" UHDTV and I've had no problems. And I use my TV as my monitor exclusively, but there IS a dedicated 4K HDMI 2.0 input on mine for this, as this series was designed for gaming. There also may be other settings in your menu for optimizing this kind of thing. There is in mine. Much trickier than using a monitor, but worth it when it's all sorted out.
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luojames52

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P.S.,
Most TV manufacturers recommend using Hi-speed HDMI cables and preferably shorter than 3 meters (some say 5m).

This is currently not true since I was able to do 4k gaming on a 10 meter long hdmi cable in 4k that links from my room to my living room with no drop in frames
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flobelix

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Open an own thread for any questions please. Don't resurrect this one. >>Please read and comply with the Forum Rules.<<
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