We have also overclocked the Nvidia GeForce GTX 1080 Ti. For this test, we put the fan speed at 100% and the power target on maximum. Additionally, we overclock the Core i7 5960X further to 4.5 GHz, to ensure that the processor is not the bottleneck. Our very own overclocker Joost 'Rsnubje' managed to clock the card at 2062.5 MHz. At least in the case of our card, it appears that its overclocking potentional is slightly less than that of the Titan X (Pascal), which clocked at 2114 MHz. The same is true for the memory speed: 1426 MHz for the GTX 1080 Ti and 1475 MHz for the Titan X (Pascal). The GTX 1080 Ti's standard boostclock is 1582 MHz, and the memory runs at 1375 MHz. Of course, in both cases it is a single card, so we cannot say how representative our results are.
In 3DMark Fire Strike, we get a maximum score of 24816 in Fire Strike. Fire Strime Extreme won't work on the maximum overclock: the shaders can 'only' be clocked at 2050 MHz. We get a score of 14513, more than 10% higher than what we get with the standard settings.
We also benchmarked some older versions of 3DMark. In 3DMark 11, we get a score of 33533, and in 3DMark Vantage 77309. Very nice results in general, but perhaps custom cards, with better cooling and VRM's, will be able to show even better results.