Hello
Here another "victim" of AMD X399 surviving Windows 11 and sharing experiences, also learning from you :)
I will begin by quoting Chapter 40.3 USB Audio of the UCXII User Manual (page 115):
Best USB 2 performance is achieved by connecting the UCX II to its own bus, which should be
no big problem as most USB 2.0 interfaces are a double bus design. A check in the Device Man-
ager can be done as follows:
> Connect the UCX II to a USB 2 port
> Start the Device Manager, View set to Devices by Connection
> Select ACPI x86-based PC, Microsoft ACPI-Compliant System, expand PCI Bus
This branch normally includes two entries of a USB2 Enhanced Host Controller. A USB Root Hub
can be seen, which then connects all USB devices, including the UCX II. By reconnecting to a
different port this view shows at which of the two controllers the UCX II is connected. With multiple
devices it can be checked if they are connected to the same controller.
Unfortunately this wasn't helpful to me, in my case (and I guess for many others too) Windows Device Manager is a disaster to get accurate information about the USB devices connected to each port/controller, at least in an accessible and easy way. Also X399 was never a final destination, but rather a step in their marketing experiment where AMD (also Intel) tries to convince us that “you need a new CPU”, almost offensive seeing the botches they have left along the way.
Criticisms aside, the tool that has been useful for me is Microsoft USBView (also Win11 supported), link bellow
https://learn.microsoft.com/en-us/windo … er/usbview
And bellow an edited screenshot using USBView where you can see different USB devices, from USB 2.0 up to USB 3.1 Gen2, connected to my motherboard ports and headers which I will now explain as a non-expert user in the field:
- Green rectangles=USB Host (Motherboard) Controllers
- Red rectangles/arrows/text: Connected devices that may interfering correct UCXII data transfer due to user's ignorance or motherboard maker's clumsiness. Please see the 1st USB Host Controller in the tree ...
- Blue rectangle: RME Fireface UCX II.
![https://onedrive.live.com/embed?resid=3411252949887438%21589&authkey=%21AN8v9cXxrlvSeko&width=1183&height=1094](https://onedrive.live.com/embed?resid=3411252949887438%21589&authkey=%21AN8v9cXxrlvSeko&width=1183&height=1094)
As you can see in the drop down tree on the right the first USB Host Controller groups from 2.0 to 3.1 Gen2 including the integrated Bluetooth module on the motherboard, this is what I mean by saying "maker's clumsiness".
So my conclusion based on my experience is that to avoid data checking errors via RME USB Settings I must connect my UCXII to an exclusive USB Host Controller for it, in this case a USB 3.0 motherboard rear port (or what is the same USB 3.1 Gen1). Since then 0/0 errors, a different matter is how Windows 11 and DAWs do their job ...
Another tool that I find useful is Fix problems using Windows Update, I have to reinstall the RME and Focusrite drivers after using it but at least I keep files, applications and settings. To do this follow the path:
Windows Settings→Windows Update→Advanced Options→Recovery→Fix problems using Windows Update→Reinstall now
... but I also know that in a short time I will have to perform a clean installation of Windows 11, so tedious but useful.
Thank you OP and RME Community
FF UCX II 106/34/104 v1.251 - PC X399 + Windows 11 Pro 23H2 - Reaper 7.20