Hey Asus, this is an urgent and pressing matter that demands your attention. Let me first point you to this page regarding the supported boards for the
ThunderboltEX 3. You can see that Maximus VIII Ranger and Z170-A are supported. However, I have tested this extensively and it seems Thunderbolt bios options were the right ones up until BIOS Ver 2202, when it still showed some information on the Alpine Ridge hardware. After 2202, i.e. 3007 and up, the Thunderbolt bios options changed and there is no configuration that actually allows the ThunderboltEX 3 card to work. This is preposterous. I know it's only a minority of users who use the Thunderbolt card, but you cannot possibly go ahead and include a non-functional Thunderbolt bios module for boards that are supposed to work with the card. I bought the board to use with the ThunderboltEX 3 card, I ought to be able to use it. Please fix this issue ASAP. My suspicion is that you guys ended up using the Thunderbolt bios module of later-gen boards on the Z170 boards, and even so, it is still a cut down version as it lacks the options that, say, the Z370-A has. For real, this has to be fixed. I'm stuck running 2202 which isn't a very good bios as it lacks the microcode updates and its DRAM compatibility is rather poor. Had to switch out my 3200 RAM for 2400 RAM and it still has issues booting from time to time. Ultimately left it at JEDEC specifications through manual settings and it's able to boot consistently.
FIX THIS!