Is my DAZ / iRay using my CUDA cores? (CLOSED) (CLOSED)

How can I tell if my DAZ is rendering with GPU / CUDA?

I was looking in TaskManager today and it is showing almost 95% CPU but only 1% GPU load while rendering with iRay.

Makes me wonder why DAZ is using so much CPU and so little GPU?  I can't see any info regarding CUDA core loads.

How can I make sense of what's taking place while rendering?

GeForce Titan x, 12GB RAM.  CPU AMD Ryzen 6 core no onboad GPU 32GB Ram.

Is there a utility that can show me activity on my GPU?  I have GPU-Z but it lacks CUDA level observation.

Thanks for any feedback.

( Note: I have seen some posts about problems with Win10 not playing nice with Nvidia and other GPU's but was not a recent post )

I DAZ you must activate the GPU by
Rendersettings
Advanced
Hardware
Cudagpu
if it is set, you see it by rendering using the memory of the nvidia

Every time I render, I use GPU-Z to make sure my scene has fit on the cards. If it shows GPU Load close to 100%, I know I'm good to go. 
If you need more info about what's going on, you can get it with this:  https://developer.nvidia.com/nvidia-visual-profiler