[Mount81]

I know that HDR is a work in progress and that gemini lake and above should be able to properly show HDR.
And i know, that the J4005 is the lowest end of the gemini lake with UHD 600 and that J5005 is probably the better choice (2vs4 cores, UHD 600 vs 605).

Now the question: should 4k 60Hz with 10bit HDR run as well on the J4005?

Asking because in this test (https://www.elefacts.de/test-68-intel_nu...windows_10) which is running on Kodi in Windows, the test file did run perfectly on the J5005, but not on the 4005, and the CPU Speed was not the problem (was at 20-30% usage).
Can anyone confirm that 4k 60Hz 10bit will make problems with J4005 on libreelec?

It's quite only the matter of the IGP, not the CPU power itself with video playback. UHD with HDR video playback sometimes needs a quite a bit of a IGP craft. See that even the Vega 8 and Vega 11 IGP's in the Ryzen APU's are just the very entry level for 4K / HDR and those are much powerful IGP's than any other Intel currently. Intel's may also could do to some kind of level, but it also depends on such things like how demanding is to playback the particular video: bitrate/codek/fps/HDR/ and the playback software that mostly matters. So in this state i guess, it's kind of very unpredictable to tell anything for sure how it would turn out (if anytime) in practice for Gemini IGP's. Needs than lots of testing, with lots of different test videos, many different playback software options and settings tweaking all around.