The Intel NUC6CAYH shipped with a HDMI firmware flaw in the Intel Celeron processor contained in this computer that results in no sound via HDMI without a firmware upgrade that is only possible with a Windows 10 OS. The work around requires a Windows PE bootable USB, which can only be created with a Windows 10 machine. This leaves previous versions of Windows and all Linux users without the ability to use this NUC as a media device via HDMI. Video works fine, just no sound.The memory suggested in "customers also bought" Crucial 8GB (2x4GB kit # CT2KIT51264BF160B) triggers a warning on boot that the memory is incompatible, even after updating BIOS to Feb 2019 release. The above named kit is listed on Intel's website as compatible. The CT2KIT... modules are 2 of the CT51264BF160BJ single 4GB Crucial modules suggested in "Frequently Bought With". After installing Lubuntu 16.04, updating and then installing the memtester utility, the system memory tested ok using the CT2KIT...modules to 7580MB or just under the 8GB expected. Why the CT2KIT triggers the warning is beyond me.