Just Cause 3 Graphics GuideIf you're playing Just Cause 3 with a GeForce card, you need to go here:
Just Cause 3 Graphics & Performance Guide
It's a methodical, setting-by-setting guide to optimizing performance in the game.
If you're not playing the game yet, I can say that an Intel i7-5820K CPU @ 3.30GHz and a GeForce GTX 970 is buttery smooth at 2560x1440 with all settings maxed.
Well, it's buttery through about an hour of the game, anyway.