[EDIT]hmmm.....whats going on at AMD? (and history of 3Dfx Rampage)

[BoFox]

GTX 1080, for 1080p only.  Probably just GDDR5 rather than GDDR5x, as it seems late too (like HBM2). 

Milking the $799 cow, since 8GB isn't enough for that $1000 cow (where the Titan X is at, sucking with its own 12GB teeth).