RT - how to get 100% GPU/CPU usage?

[Micha]

Hi,

I setup a simple scene with a plane, a box and a dome light with HDRI. Why I don't get 100% GPU or CPU usage? The usage is around 40%..70% only.

Ciao,
Micha

[Svetlozar Draganov]

Have you played with the Performance Settings(Ray Bundle Size / Rays Per Pixel)?
http://docs.chaosgroup.com/display/V...ne-Performance

Higher values should increase the CPU/GPU usage lower should decrease it.
What RT engine you are using?