Aura for most just drops without notice and becomes completely not functional. But since you managed to set it.once and have not messed with it and have a simpler setup than most... You managed. Hopefully you can keep it up without having to mess with it again.
Regarding the pcie lanes..
If you're using Samsung drive you can check the pcie lane speed in the Samsung's Magician software.
Most if not all of the Zenith owners cannot get the bios setting to stick to 8x. You configure it to be 8x it reboots and again 4x.
This has impact in the max output you can have your ssds achieve, this issue is covered and reported here:
https://rog.asus.com/forum/showthread.php?96929-Samsung-960-pro-M-2-DiMM-2