I had a fully working build with above motherboard, Recently updated to High Sierra and it turns out that the machine is Rebooting on shutdown.
So I dig down on the issue and found that ALXEthernet is causing the reboot. For some reason, that lead to kernel panic on shutdown.
If I manually unload the kext the same happens(system reboots immediately). (If I remove the kext from the system, system is fully working without ethernet)
It seems that the kext has not been update since 2014...
GAZ77X-UD3H-Atheros-GbE-LAN
So I dig down on the issue and found that ALXEthernet is causing the reboot. For some reason, that lead to kernel panic on shutdown.
If I manually unload the kext the same happens(system reboots immediately). (If I remove the kext from the system, system is fully working without ethernet)
It seems that the kext has not been update since 2014...
GAZ77X-UD3H-Atheros-GbE-LAN