I’ve installed Qubes 4.3 on a Intel Ultra 9 with RTX 5070. You can see the HCL here. I’m not using the NVIDIA card just the integrated Intel one.
It isn’t as easy as popping in a USB with Qubes 4.3 and install I’m afraid; but it can be done.
Here we have a discussion with people who all run Qubes 4.3 on Intel Ultra 9 and if not mistaken all have NVIDIA cards about the patch and problems that we still have running it mostly USB-c/TB problems.
Kind regards, Bloged