Q:

Why my GPU load is low when is rendering a scene with Blender?

I have a scene in Blender and I render it with GPU Compute, Cycles.
The problem is when the scene is rendering, my GPU load is under the 5% while the CPU is doing all the render work.
My GPU is a Nvidia GTX 745 and my Cpu an Intel core I5. The blender version that I am using for render is 2.82a.
Anybody knows why is this happening?

A:

You could go into the blender preferences, (edit>preferences>system>cycles render devices) and try looking for your GPU, as you may have 'none' selected.
It might be under a different path tracing GPU option

