I just finished configuring a new HEDT with an AMD 3970x (32-core Threadripper) processor and an RTX-3090., and am having some issues with Blender. GPU-only rendering with the 3090 only works in Blender 2.9, in all other versions I get the error “Cuda binary kernel for this graphics card compute capability (8.6) not found”. When I try rendering in Blender 2.9 with both the processor and the GPU checked in the CUDA settings, a serious crash occurs that immediately powers the computer off (this happens as soon as Blender starts rendering tiles on screen).
There was a fix for a similar binary kernel error by downloading and adding a file (kernel_sm_75.cubin) to the scripts > addons > cycles > lib folder, but it appears there is no such file yet for 8.6 (which should be in theory kernel_sm_86.cubin). There are plenty of CPU+GPU benchmarks for my setup, so I know it is possible.
What am I missing? Thank you so much for any insight!!