Latest Drivers/Software:
Dante Controller, DVS, and 'DD' -yes!
Did not check the firmware of 'DD' yet!
The Z420 is a Win10 machine.
The Lenovo is a Win7 machine.
Both OS's last Update not older than 6 weeks.

I'll have a look on the firmware version! in

Just to clearify, the FIFO Error starts when I open a project (Vip).
Before that, I get an absolute perfect audio signal through Total Mix.
No FIFO Errors.
This does not happen, when I use USB2!
Allthough I assume that the overall performance of USB2 will be less than that of a healthy USB3.

Thank you for reply
Stefan

Firmwareversion has been already 36
The driver is (and was) "driver_madinet_win_09700_09442"

Best
Stefan

I tried to help myself using external powersupply already. It did not bring any difference.

Yes - USB3 it's third party on this board.
It's Texas Instruments.
I'll try to get dedicated drivers for that.

Thanks for your help
Stefan

I can recommend 5m Lindy USB cable, it has 3 (!) shields and work phantastic. With a 5m USB cable you are so much more flexible in positioning the devices.

https://www.amazon.de/gp/product/B07F6W … &psc=1

I made the experience that USB devices can influence each other somehow. My server board with C612 chipset was usually able to drive two (!) UFX+ very reliably. This changed once I started to add more USB devices like i.e. Bluetooth and USB3 hub.

Those issues I could fix with an additional USB3 PCIe card which fully isolates the recording interfaces from the rest of the USB infrastructure of the system.

The UFX+ manual gives a list of compatible / tested USB3 controller that work very well.

I got a very special card, Sonnet Allegro Pro (old model with 4 x FL1100 USB3 chips),
https://www.heise.de/preisvergleich/son … 79334.html
which is sadly not available anymore.
A little unfortunate that the vendor uses the same name for newer cards with different chipset.
Not cheap (around €150) because it has 4 USB3 controllers on the card, so ideally if you want to connect more than one recording interface. But it needs a free PCIe socket with 4 PCIe lanes connected to it. Not all boards provide this. And careful if you use a second x16 socket, not that your main GPU changes from x16 to x8 operation mode.

Sonnet also offers another card, Allegro (without Pro) which has only one FL1100 chipset shared between the 4 ports of the card. If you connect only one or two recording interfaces, then this should be well enough.
But you should look closely whether it still has the FL1100 chipset.

Another maybe even important thing is to look at the USB drivers. The Sonnet card uses MSI (message signalled interrupts) which work more efficient compared to a pure IRQ based driver model, esp under load.

But as uwekirst says there are also other USB controllers which meanwhile work very well.

I upgraded my PC later with this card to get USB 3.1 gen2 speed with UASP support (USB attached SCSI protocol IIRR)
for high throughput backup purposes:
https://www.heise.de/preisvergleich/sta … 03149.html

Those ASMedia chipsets (ASMedia ASM2142) also work very well with the UFX+ and also work with MSI.
So such a card could also be a good alternative to Sonnet cards with FL1100 chip.
But those USB 3.1 gen 2 cards are also high speed cards which require a free PCIe socket with 4 PCIe lanes.

If your mainboard has such a 3rd party ASM2142 chip (or the newer one) on board, then you should be fine to isolate the recording interface behind this chip. You only need to locate the USB connectors on your mainboard which are fed by this chip.