In CUDA you can use 16*16 tiles without slowdowns. OpenCL can’t. Also there are builds for CUDA that are like 40% faster than the official Blender.
The link E-Cycles - Faster cuda rendering
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In CUDA you can use 16*16 tiles without slowdowns. OpenCL can’t. Also there are builds for CUDA that are like 40% faster than the official Blender.
The link E-Cycles - Faster cuda rendering