You must be new to hardware. It makes perfect sense. The 1070 is faster than a $999 Maxwell Titan X, and it's almost one third the price. Does that make sense to you? It should. An RX480 is faster than a 390X yet is less exp - oh never mind. It isn't. Well it's pretty hard to have 5 cards faster than the 980Ti without Titan X, 1080 and 1070. Same thing with 980Ti, which now costs around $350, most people who own it won't have the reference model being tested in the reviews. The performance landscape in this game is no different from Hitman or AotS, both games that launched with 390X matching 980Ti or slightly outperforming it. Same as here. Incidentally, this uses Hitman's Glacier engine - modified and called Dawn.