Hi all.
Although my Z170X-UD3 with bios F23g does not natively support non-volatile nvram I still do not use EmuVariableUefi-64 and it's associated scripts but rather AptioMemoryFix-64, and that works well indeed. After I studied this thread I got the impression that for some mobo/bios combinations, that do not support non-volatile nvram, there is no alternative other than using EmuVariableUefi-64 with it's scripts. In my case I have been using AptioMemoryFix-64 successfully for quite a while and therefore suggest to try that route first because if it works for you you will get crash reports on the next reboot, after your machine crashed.
Greetings