USB and PCIe problem with my X399 Taichi

I am unable to detect anything in my PCIE3 either and am after an avenue to follow this issue up on, I have a video capture card but a card is a card when it don't work.
Cheers,
hairy.

Sorry, Nacka67, you are absolutely correct and I was using the X370 Taichi manual and therefore very wrong.  The only restriction seems to be the U.2 one you pointed out.  Have you tried to see if powering up with a rear USB 3.0 plugged worked?  If you installed both the Allin1 and the 18.10 from AMD then I am not sure.  In general you should not use the drivers from ASRock.  Please use only the AMD chip set drivers.  The exception is the RAID drivers should be ASRock.  All my drivers I got from the vendors (Intel, Realtek, etc not ASRock).  ASRock drivers tend to be down level.  Only RAID and Aquantia (10 GBps LAN) drivers come from ASRock because they have been modified.  I would suggest you open an ASRock support ticket and ask about the RME PCIe problem.  Please let us know what you learn.  Thanks and enjoy, John.

Nacka67, I have the X399 FGP and have a rear USB 3.0 socket problem at power up.  I am aware of at least one other user with the same problem.  If I power up my system with nothing plugged into the rear 3.0 sockets, the sockets will not work.  If I power up with a USB stick (or mouse, or etc) they all work OK.  Top and rear 3.1 always work.  However, I never see any error messages.  Where are you seeing your messages, logs?  Please try it with at least one socket plugged at power up and see if it works.  I reported this to ASRock, but they refused to try it with nothing plugged, so it did not fail.  Enjoy, John.

EDIT:  Get latest chip set drivers (18.10) here: https://support.amd.com/en-us/download
          What are these? : Latest AMD all in 1 driver ver17.10.3401
          If they are from ASRock, please forget them.
          Is your RME the Rme Hdspe Aio Pcie Card?

EDIT "* If M2_1 is occupied, PCIE4 will be disabled."
        "PCIE3 (PCIe 3.0 x16 slot) is used for PCI Express x8 lane width graphics cards."


Edited by MisterJ - 15 Feb 2018 at 9:30am

1) if u are 100% sure that usb drivers are ok, then ull need to clean up registry
hklm/system/current control set/class/... here search for your broken usb device and delete it then reboot

2) can u check windows protocols to see if there is anything related to it?

1) code 10 can be either driver or registry fault, hardware fault would be different number
for this u can try contancting online micrsoft support (they should resolve it rly fast imo as i contacted em several times and it was all quick solutions)
or u can google code 10

2) windows doesnt see it? or