Yes as far as I know, I tried the only 2 Nvidia drivers for the 5090 on their page and multiple mobo bios along with pcie gen switching and few other bios options but nothing changed.I’m going to assume you‘re on the latest drivers available that actually have support for the 5 series? GPU-Z can only show info if it has a valid device ID to work with. I’m just reaching at this point for possible reasons it’s basically not being recognized and possible reasons why. The Code 43 could also be explained if this is the case.