This question asked how to target an Nvidia GTX 1080 with MMA 11.0.1 (which is also my current version) and from the comments it is clear that the user was then able to use this card successfully even though it is not [22/04/2017] on Wolfram's list of supported hardware.
How can one determine reliably whether a particular GPU is in fact compatible with (specifc versions) of Mathematica and/or CUDAlink?
I intend shortly to build a new Windows (10) based PC with a GeForce GTX 1080 Ti and would like certainty of usability first, but the currency of the supported hardware lists and actual usability of specific cards is surely a more widespread interest as HPC becomes (relatively) more affordable.