Oh my god this actually works. I wasn't expecting to get an FPS boost but it seriously works. For me I didn't have to return to the game after changing resolution, just set to 1600x900, hit enter to confirm, and change it right back, enter again and upon returning to gameplay it was smoother. On my 3570K (4.4 GHz) and GTX 780 system I'd get frequent dips to the 40s with everything maxed except SSAA (which was off). Now, while I don't have an FPS counter up atm, it feels like a solid 60. I seriously didn't expect this to work as there's so many fake spammy videos on the 'Tube for various games fixing similar issues but this truly fixed my issue. Thank you @Rabid Stew (@wackam0le) for making my game playable! I had just about given up on this game.