I have recently bought a laptop with Nvidia GeForce RTX 2060 and Intel i7-9750H. I immediately updated drivers and tried running a simple test rendering and I used to get these results:

CPU: 3 minutes GPU OptiX: 40 seconds

I then tried to install CUDA toolkit (I want to study some machine learning and I needed it for GPU computing), after which GPU would have a huge performance drop:

GPU OptiX: 5 minutes

I tried multiple times to reinstall the driver through GeForce Experience, until I just uninstalled everything, the whole CUDA toolkit and the driver, and reinstalled the driver. After this, though, Blender won't reload any kernels and would keep the old ones, as well as the bad performance. Any idea on how to fix this? Thanks a lot :)


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