@ravenet Ok I think the pro gpu's work better without so many bugs.
I switched to Nvidia RTX 4070. With the Nvidia gpu and this works as it should and gets an image on the screen on the first try.
So there must be something wrong with the amd drivers plus that error with the amd reset bug
@tuxen yes Xen & XCP-ng dev teams have been really good 
Started to get a little nervous that the big investment in hardware was wasted. Never would have needed such a powerful cpu without gpu passthrough.
So thank you very much Xen & XCP-ng dev teams
what kind of magic have you put in the last 7 patches?
Now everything works no errors with letting windows install the drivers or adding drivers yourself Directly from nvidia 
Double checked this by installing a clean Xcp-ng from iso without update. Clean win 10 install install drivers then error 43 appeared install patch and started win 10 and everything works. also works with win 11
@olivierlambert Yes, I hope so 
. I don't need so many cpu cores if I don't have any ext gpu
Is it the bios that determines which screen the xcp-ng console should be displayed on?
As soon as I choose passthrough enable, I lose this image on the screen associated with the ext video card.
But it doesn't come back on any of the other screens connected to the motherboard, nor does ipmi show this xcp-ng console.
even though I have selected primary video adapter to int graphics in the bios.
This is the main difference on the Radeon HD 5450 that gpu passthrough worked with. There, the primary video adapter remained on the graphics section of the motherboard.
So one suspects that this choice in the bios does not work.
The strange thing is that normal pci passthrough works as it should on both m.2 and pci usb controller card
Asrock suport wanted to try to reproduce the error with them but have no idea if they will choose to use Xcp-ng and xen orchestra. It takes quite a long time to set everything up
@olivierlambert Yes but is beta bios to support the new Amd Ryzen9000 series. But there may be some bugs in the bios,
I think the motherboard was launched after April this year. First bios slip 27/7/2024.
I have contacted Asrock support, But there are so many links that the error could lie in.
But there are several with B650D4U3 motherboards that have the same error
Not sure if this is Xcp-ng 8.3 or Nvidia based error.
But when I try to take gpu passthrough with a gtx 1070ti with windows 10. I get the drivers installed fine without errors but after reboot I get an error triangle in the windows device mangager-. error43 and no image on the screen
Wasn't Xcp-ng 8.3 related or windows drivers I think.
Tested with another PC with Xcp-ng 8.3 and everything worked immediately. So think it must be Asrock rack B650D4U3-2L2Q bios related or ipmi trying to use the same gpu.