"Nvidia CEO Jen-Hsun Huang made some startling performance claims regarding its new graphics cards. Huang said the GTX 1080 will be twice as fast as a single Titan X—all while using a little more power than a single GTX 980. The GTX 1070 is purportedly faster than a Titan X."
Jeff Kampman - TechReport.
Nvidia GTX 1070 & GTX 1080 GPU release discussion by TechReport - Here.