Do you really need SLI support with a Titan X? You should be good for 4k/60fps. Or 1440p @ 144hz no problem with a single card.
Even my old PC with an R9 390 maxes this game completely out and gets 120+FPS running on Vulcan @ 1080p. I even bumped the resolution up to 3200x1800 using VSR and still get consistent 60+ fps. Not a single stutter, ever.
My new rig with a 1070 completely destroys this game. Tested this game on 2 different PCs and it runs VERY GOOD on both. Pretty sure a 1070 could do 4k/60fps/max.
I'm getting texture popins using Vulcan on my 1070, but it does give me a frame rate boost over OGL. But its way over the refresh rate of my monitor regardless. Those same texture popins don't happen on the 390. But Vulcan is arguably better for AMD cards anyway.
Edited by chaosblade02 - 8/23/16 at 7:12pm