seen with your own eyes or seen in reviews ??
like I said just look at all the posts pouring in to forum sites with this game and issues ???
with that is not looking too hard to figure out
also from a NVidia sli review from techpowerup
''Since this is our first multi-GPU review after new-generation consoles settled into the market, we noticed a worrying trend in game engines (particularly with cross-platform games for new-generation consoles) where deferred rendering doesn't take advantage of multi-GPU setups; in games such as Dead Rising, Assassin's Creed: Unity, or Ryse. A tell-tale sign of such an engine would be the lack of MSAA support. That could spell trouble for not just a SLI setup with affordable graphics cards as it could also hit NVIDIA's enthusiast-grade multi-GPU market hard, including its flagship dual-GPU solutions.''
so with that what are they seeing ???
SLI= Sudden-Loss-_of Income