3DMark
3DMark is the latest version of this hugely-popular synthetic benchmark. Making use of DX11 features such as tessellation, compute shaders and multi-threading, it provides modern-day results and is available as a free download.
We're seeing a 10 per cent hike in performance over the Nvidia Founders Edition, made possible by the GTX 1070 having more frequency headroom than the GTX 1080. Remember, too, that Palit overclocks the memory.
What's immediately clear is that no air-cooled GTX 1070 is able to beat the most conservative GTX 1080.