Ok so on my 560Ti,I finally got the game to run with almost none of the stuttering...I turned off Ambient Occlusion,it seems like a 2 year old card with 1024 of Vram really doesnt like AO,I lowered the resolution to 1600x900,lowered all the other settings on high,except one I forget who is on Very high,Post Processing at normal and added the bInitializeShadersOnDemand to TRUE,that last one really seemed to help...I get the little stutter when a door opens to a new area but it runs smoothly after...