Going to throw my hat in this ring too.
I have two EVGA 1080 Ti FTW3, in the Nvidia Control Panel.
The top slot is showing as the second card, and the third slot is showing as the first card.
The issue I have is I can not get SLI to work with both cards and 3 monitors. If I put one of the monitors on the second card it never turns on. So as of right now I have SLI all 3 monitors running on one card. There is is about a 4 to 6 deg c. difference between the cards at idle, and around 10 - 20 deg c. at load.
With EVGA Precision, the cards are cards show up as the first one is in the third slot and the second one is in the first slot.