System Information
Operating system: Windows 10 64 Bits
Graphics card: GeForce RTX 3070 NVIDIA
Blender Version
blender-2.90.1-windows64.msi
Short description of the error
'No compatible GPUs found for path tracing' error in OpenCL, as well as OptiX "OptiX support is experimental, Not all cycles features are supported yet.’
Can't use GPU for rendering (Cycles - Supported - GPU Compute is greyed out).
Drivers are installed and updated to the most recent version.
The RTX 3070 does not show up in the OpenCL area as it is prefered that you use CUDA or OptiX on a Nvidia GPU as they generally offer a wider range of features and generally better performance. Please use CUDA or OptiX.
MANY THANKS! I switched to Optix and the GPU compute does not grey out. But now I can't see anything under the render preview mode. I wonder why this happens?
@Alaska (Alaska) is correct, Blender uses either CUDA or OptiX for Nvidia GPUs. The OpenCL option is only available for AMD GPUs, as explained in Blender's manual. The reason nothing shows up, is because you've paused the rendering (play button in the top right corner of the right 3D view).