Fortunately there's a way to make the nvidia's installer think it is actually dealing with compatible hardware and proceed with installation.
- Extract installer package.
- Go to the directory where driver files have been extracted and find Display.Driver\nvae.inf file.
- Open the file, find following sections and add lines:
%NVIDIA_DEV.0A6F.01% = Section002, PCI\VEN_10DE&DEV_0A6F
%NVIDIA_DEV.0A6F.01% = Section003, PCI\VEN_10DE&DEV_0A6F
- Save the file and re-run the installer using setup.exe launcher in the directory where driver package was extracted (don't extract downloaded package again, as it will overwrite changes above).
- Installer will complain that driver is not certified blablabla - ignore.
- Job done.
Point to note is that display driver updated using method above won't properly show as "nVidia Display Adapter" in Device Manager but more-or-less like that:
User sib321 over at nvidia forums.