Check it out, a teaser of a new high-end GTX 1080 Ti surfaced, it's the Gigabyte Aorus WaterForce Xtreme Edition. The 1080 TI Water Force Xtreme Edition features a custom PCB with VR-Link for additional HDMI ports and thus likely has the same PCB as the current Aorus version.
The card has no fans but tubing is leading out towards a 120mm radiator. The design is black and orange. There is also some Fusion RGB lighting going on. Check 'r out:
Teaser water-cooled Gigabyte Aorus WaterForce Xtreme Edition GTX 1080 Ti emerges