Blender 2.8 official
Windows 10 64 bits
Not sure if it is a bug but GPU only works at 1 % most of the time when rendering.
I recognize that my complex scene uses few bitmaps and most textures are procedural mixed nodes. All geometry is very optimized and uses subdiv surfs at render time.
What i do not understand is why CPU is being used at 100% and GPU only 1 %.
I always have GPU rendering method selected.
Any idea? Thanks