Hi, may you check Cuda/Optix with other render software, like Luxcore or Octane for Blender, both free to use.
Some video editors and Photoshop use Cuda too, for example.
I had some problems with Blender and Cuda years ago but Octane does not work, so I was sure it was on my side.
No problems for me with Cycles on Windows 10/11 (Driver 371) and Linux (Driver 360).
I have a GTX980 and a RTX2070, using Linux Mint with Nvidia driver 356 (not sure, I would need to check). No problems with both Cycles and Octane. I donât render with the 980, just the 2070.
Is this factory defaults Blender with nothing else enabled? If that is what you are getting with the vanilla Blender then your issue is confined to your system, because that does not make sense otherwise. Do you also have other apps with GPU needs that are be open while using Blender?
Rename your Blender user folder C:\Users\USERNAME\AppData\Roaming\Blender Foundation\Blender (Windows) and restart Blender, so it creates the whole user folder from scratch for a basic testing. Purge the Nvidia driver and reinstall following a system restart. Then enable Cuda and Optix accordingly to see if you still have an issue.
Good advice, but would it be strange if that is the problem since the user commented that it had also been tested in a different clean installation of Windows?
Yes, I missed that.
Though âclean installâ can either be a real re-install with formatting c: and then re-installing from scratch or it can mean this other thing that windows does which is resetting to factory defaults or whatever it is called.
No idea if the latter kills the optix cache.