Please register for Total War Access to use the forums. If you're an existing user, your forum details will be merged with Total War Access if you register with the same email or username. For more information please read our FAQ’s here.
So I have an i5 3570k with GTX970 and the game didn't run very well for me untill I did this:
1. Uninstall ALL parts of the driver (GeForce Experience, HD Audiol, 3D, Physx....). 2. Download Driver Sweeper from Guru and use it (run it with safe mode) 3. Install latest drivers, download from Nvidia directly DO NOT INSTALL GeForce Experience, I repeat DO NOT INSTALL it !
GeForce Experience seem to be the cause of the issues, creating a profile which is damaging the game's performance, so first you must clean it off your system completely (uninstall and using driver sweeper) and then NOT reinstall it.
This fixed it for me, getting stable FPS now at Ultra (with some options on high just to keep it above 60 at all times).