[Solved] High Sierra GC Alpine Ridge Thunderbolt 3

[dodo]

So I got my thunderbolt to Work! Ive been able to restart and shut down/power on and my interface connects over thunderbolt every time! In BIOS, I
Enabled thunderbolt,
Enabled Thunderbolt Boot Support,
Enabled Enabled GPIO3 Force Pwr
Enabled Skip PCI OptionRom
Security level set to No Security
Reserved Memory 737
Reserved PMemory 1184

all other bios settings are UEFI and what They said to do in the installation. Good Luck!!

i am not able to mount my TB3 drive. have you try that?
are you using any SSDT?