Daz isn't using the second GPU.
Hey,
Today I bought a GTX 1070Ti and added it to my GTX 1060 6GB.
Both are shown in the render tab but when I click render. Only the 1060 is being used.
So I tried a small scene with just a character, and the same thing happens.
If I only enable the 1070, it will render the scene.
But I want to use both cards for faster rendering. And Daz isn't dropping the 1070 bc of "not enough memory" (I tried the almost blank scene.)
Thank you.

Comments
What's your PC configuration? Nvidia driver version installed?
@Elysich
How do you know both GPUs aren't being used? Task Manager isn't very good at this Have you tried GPUz?
Can you not check the log to see which or both cards are doing the GPU rendering?