In one of our machines we are getting this Optix error if we try to use the denoiser, the render with optix works, the GPU is a GTX1080, in a different system we have the same GPU and it’s working fine, the drivers are the latest 450:
Interesting that I found this now. I get the same error with the 2.9 release. However, deleting the userpref.blend didn’t seem to fix the issue. I’m running a RTX 2070 gpu and don’t seem to have any problems with Blender 2.83.5 or any earlier versions using Optix denoise.
I can confirm that LuxCore render appears to be the problem, though I’m not certain has been an issue from the day I turned LuxCore on. I think it only appeared a few days later. However, disabling LuxCore gets Optix denoising working again.