I have a Intel NUC8i7BEH manufactured 17OCT2018 with most recent BIOS, a SATA-SSD and a 970 EVO Plus NVMe M.2 SSD.
On the SATA-SSD is a bootable Fedora 30 (upgraded from 29). On NVMe-SSD is a Fedora 30 Silverblue.
Both installations Fedora are freezing at least once a day or more. Constantly. No more mouse, keyboard and no network anymore. No ping possible. No LED for HD-activity.
I stripped all to have only mouse, keyboard and monitor attached.
Very often fsck says FS has to be repaired. I already lost data (profile from Firefox). Yesterday I lost important works.
What can i do?
How to know wether it is a HW failure or the OS(Fedora)?
There are no relevant messages in the logs and CPU is about 40degree Celsius.
Linux is not supported by Intel O.S. on this NUC. In order to verify if the problem is caused by hardware you should install Windows 10 64bit:
After installing Windows, please install drivers from the Intel Download Site: https://downloadcenter.intel.com/product/126148/Intel-NUC-Kit-NUC8i5BEH
No Linux on Intel NUCs? Realy?
Linux* Support for Intel® NUC
And what about Intel's own Linux distribution: Clear Linux team uses multiple methods to optimize for performance on Intel products
Yes, only Windows 10 64bit is validated and supported for NUC8i5BEH https://www.intel.com/content/www/us/en/support/articles/000005628/mini-pcs.html . In the link you posted some Linux distributions, where checked on NUC7ixxxx, however not by Intel.
Leon is correct - and you would have understood this if you has actually read the pages that you referenced in your snarky response. Only very limited support for Linux is offered (and no, there is no validation of Linux on NUCs being done). You need to be asking these questions through either the forums offered by the Linux distributions themselves or the (separate) Intel Linux communities at https://01.org/ and https://clearlinux.org/.