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I have the same issue as Timothy Tinsman on Debian 10 up to date: Blender 2.83 / 2.83.5 and 2.90 don't recognize my RTX 2080 graphics card as compatible with Optix.

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CUDA, on the other hand, is functional.

The NVidia driver installed is the one offered by Debian in the non-free repository: 418.152.00 stable. As suggested by Timothy Tinsman and in this post on blenderartists.org, I checked the packages libnvoptix1, libnvidia-rtcore and libnvidia-cbl. They're all installed.

Another leads? Thanks!

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I switched the NVidia drivers to 440.100 (from the backports repository) and Optix now seems to work. 👍

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  • $\begingroup$ Now it seems to work also for RTX Titan and Quadro 2000 on NVIDIA-SMI 510.85.02 Driver Version: 510.85.02 CUDA Version: 11.6 driver (debian testing, kernel 6.0.0-4-amd64). Single install of libnvoptix1 package solved the same issue in Blender 3.5.0 alpha. $\endgroup$
    – piotao
    Commented Nov 24, 2022 at 17:28

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