Arnold rendering - low GPU usage

jugobono

I'm experiencing an issue with Arnold GPU rendering in Maya. When I render a scene it seems like Arnold is making a very low usage of the GPU ( between 1% and 4%. This is what the task manager shows. Anyone having the same issue?

oglu

Is that on all scenes or only one specific? Have you prepopulated the gpu cache?
Could you share the scene? 

jugobono

In all scenes. I tried to pre-populate the gpu cache, but it doesn't change. It does not let me to attach the maya file, thenI post some screenshots below.