Win 7 Pro 64Bit
If I render with EEVEE via Command Line, the GPU Load is around 40-50% (4min 33sec).
Rendered the same scene in a normal way via Gui, the GPU Load is around 90-98% (3min 20sec).
If I render the same scene with Cycles via Command Line, the GPU Load is around 90-98%
blender -b PathToBlend -a
I've tried several scenes with the same result all the time.