Can NUC11ATKC4 run 4K @60Hz without chroma subsampling?

[Lejared]

I have a new NUC11ATKC4 which is connected to a Samsung TV MU8009 with an 8k HDMI cable.

Unfortunately I can not make it run in 4k@60 Hz with 4:4:4 subsampling. In ""Intel Graphics Command Center" I can either choose 60Hz and 4:2:0 subsampling or 30Hz with 4:4:4 subsampling.

I know, that I need to enable "UHD Color" feature for the HDMI port in my TV's setup menu. But if I do so, the screen stays black (no connection possible).

If I connect my Lenovo notebook with Ryzen CPU and Radeon graphics to the TV using the exact same HDMI cable on the exact same HDMI port then everything woks as expected (4K@60 Hz with 4:4:4 subsampling or RGB mode), at least when "UHD Color" mode is enabled for the HDMI port on the TV.

I wonder if the Celeron  N5105 in this NUC is even capable of doing 4K@60 Hz with 4:4:4 subsampling?

Can anyone verify on it's own machine and tell me?

Any Ideas of how to debug what signal or screen meta data is seen by the NUC when "UHD Color" mode is active on the TV for the HDMI Port?

Tech Details:

NUC Display Driver version is 31.0.101.2111 (07/19/2022)
BIOS Version: ATJSLCPX.0037.2022.0715.1547 (07/15/2022)
TV: Samsung MU8009

[n_scott_pearson]

I too was only able to achieve 4K@60Hz with 4:2:0 subsampling. Of course, this could be the result on only having a Samsung KU6290 TV. I will check this again once I have the AT located where I can hook it up to my LG 4K monitors.

...S

[Lejared]

Thanks for your reply.

I was able to test the NUC on a LG 4K monitor by myself and it work perfectly there (just hat to enable "UHD Deep color" for the 4K60 HDMI ports on the monitor).

So, that confirmed that at least the NUC is able to output 4K@60Hz with 4:4:4 subsampling (throu HDMI). It was still not working on my Samsung TV though.

Now I was wondering if the DP port would be able to. So I bought a "8K DP to HDMI" adapter and put just between the existing HDMI cable and the DP Port at the NUC and that worked!

So on my Samsung TV the NUC can not run full 4K60 when connect directly HDMI > HDMI, but can, when using the DP port with an DP-to-HDMI converter.

Weird, isn't it?