It's a mildly complicated situation where, at least at the moment, I want to drive the main display from the DVI on the 1070. But my 1070 has only one DVI output.
mostly I was just curious if it was possible at all to have both 1070 + iGPU output ... and yes, it's possible.
Right now I can get the iGPU to display to that monitor via DP, but neither the HDMI nor the DVI works.
I'm doing the same thing right now, but with DVI.
Similar story: I bought a 1070ti for $400 when that was finally possible recently, and it only has 1 DVI output. I have two ancient monitors that don't have HDMI or DP, so I used the two DVI ports on my previous 970 GTX. Can't do that with the 1070ti, so I enabled and used the iGPU really quick.
Never bothered to go back and switch it, even though the appropriate adapter is sitting right in front of the computer. meh.
Anyway, I have the same CPU, different motherboard, so there isn't any reason why the DVI shouldn't work.