GTX 1080 ti first benchmarks are leaked by chinese site Chiphell.
As indicated by screenshots, Geforce GTX 1080 Ti was running at 2062 MHz with memory at 5702 MHz. It's difficult to state what is the genuine boost clock of GTX 1080 Ti at this moment, yet we have seen some samples running at 1860-ish MHz, so that would generally be a 200 MHz overclock.
3DMark is fairly a short benchmark, yet the card did not surpass 63C under load. Based on the screenshot, power limit is set to around 122%.
Obviously, leaked benchmarks don't really need to be valid. But by looking at these, I think they are pretty genuine.
We are hoping to see AMD's VEGA soon jumping in the competition and showing what they have achieved.