Three weeks ago , I bought an intel NUC8i3CYSM .
If I set the display mode to 4K 60 Hz everything seems OK for a few minutes, but then the image disappears and the monitor tries to reconnect to the NUC a number of times but with no success.
After rebooting the same thing happens again.
I have used the HDMI cable on another system , also with 4K 60 Hz for many days.
The same for the monitor , I run it on another pc , always with 4K 60 Hz.
I installed all the latest drivers , from Intel and also from Amd.
Everything is ok when I use 30 Hz , but when I change the refresh rate to 60 Hz the problem occurs after a few minutes.
I also tried other HDMI cables but the problem stays.
What could cause this problem ?
I tried duplicating this. With AMD driver package 20.10.1 installed on Windows 10 20H2, the display (a Samsung 40" 4K TV, model UN40KU6290) connected initially at 30Hz. I changed this to 60Hz and applied. I am not seeing any disconnections.
I conclude from this that your solution is not happy with the cable you are using. I know it worked elsewise, but it isn't here.
Thank you for your reply.
I already tried three different cables that are 4K 60 Hz certified.
These cables all work on my other system.
Is the NUC extra sensitive for cable quality ?
Could you suggest a cable that should work with the NUC ?
Here is the cable type that I happen to be using with the CY NUC right now: https://www.amazon.com/gp/product/B074HNR16M.
If there is a sensitivity, it is likely in the LSPcon ICs that are used to convert from DP to HDMI.
I ordered a certified high speed HDMI cable , guaranteed up to 18 Gb/s.
It will arrive tomorrow , maybe this will solve the problem.
This NUC contains an AMD GPU , does this also have a DP to HDMI convertor like the Intel graphics ?
Well, the other possibility is that the 540 can output directly in HDMI 2.0b. I don't have any documentation for that IC to tell. I was presuming based upon seeing connection from CPU to HDMI 2.0b box -- but, thinking about it, we know that the iGFX is disabled and thus those connections shouldn't be there. If they're not, then if the 540 IC can output in HDMI 2.0b, no LSPcon ICs are necessary.
I found that the cable is not the problem.
If I connect through HDMI port 1 , everything is ok.
But when I connect to HDMI port 2 , the connection is lost after a few minutes.
So something is wrong with one of the HDMI ports.
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We are checking this thread and we would like to know if you need further assistance. If yes, could you please provide the following information?
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I finally received a certified premium high speed HDMI 2.0 cable.
The problem is gone now , even the second HDMI port is capable of 4K 60 p .
It is strange that the second HDMI port is more sensitive to cable quality .
Thank you for your suggestions .
This is why I say that 90% of all reported issues are corrected with a good quality cable.
This is also why I say that cables that come with monitors should be immediately thrown in the garbage (where they belong).
Do I sound like a preacher up on his soapbox giving a sermon? I will get down now... ;^)
Thank you for your response and feedback.
We are glad to know that the issue is solved after using a different certified premium high-speed HDMI 2.0 cable.
Having said that, we will proceed to close this inquiry now from our end. Communications with community peers may continue, but if you need any additional information from Intel, please submit a new question as this thread will no longer being monitored.
Thank you @n_scott_pearson for your support and suggestions.
Intel Customer Support Technician