Ethereum+pascal is true. I am successfully dual mining on the gtx 1070..
What Nvidia miner are you using for Pasc and Eth?
Edit: After trying this out, it only nets you about $.10 more with Claymore and Nicehash. Dual mining normally with Dcr+Eth nets more revenue.
You get $0.40 more if you weight pascal, and mine less ether..