The recipe should be well-known by now: we've upped the clock speed of our processor to 4.5 GHz for the overclocking test, to ensure that it does not become a bottleneck to our graphics card. We managed to achieve a clock speed of 2050 MHz with the Aorus card, which seems to be the limit for the GTX 1080 Ti. Every card we've tested so far did not go higher 2050 MHz, regardless of the PCB or power circuit. The memory overclocked to 1417 MHz.
With these speeds we scored 14,450 points in 3DMark Fire Strike Extreme, which is within a 100 point difference with the Inno3D card we tested beforehand. In the normal Fire Strike test Gigabyte wins with 24,482 points. On the screenshots below you can find all subscores.
We've also run some older tests for those who are interested. The overclocked GTX 1080 Ti Aorus scored 33,569 points in 3DMark 11 Performance and 79,062 points in 3DMark Vantage. The latter has also become downloadable for free recently, since Vantage was originally developed for Windows Vista. Support for that operating system has recently been halted.