I am having a very specific movement lag issue in fallout 4. When my FPS drops below 60 at all, there is a delay between pressing movement keys and moving. Additionally, movement continues for up to a few seconds after I release the movement key in these situations. Interestingly, there isn't mouse lag in these situations: I can look around while my character walks on their own for a few seconds.
It seems to be more prevalent indoors, but likely because this is where I see lower FPS. Additionally, in situations like fires in combat where the FPS lowers, the lag spikes and the game becomes unplayable. I have tried borderless window, iPresentInterval=0,vsync on, off, or adaptive through NVIDIA control panel, and all the mouse lag tweaks that I can find (which seem to work for that issue). I have also tried rolling back the drivers to 358.50.
Lowering the resolution works, but I think only because that means I can maintain 60 fps.
Anybody have ideas that I could troubleshoot with this issue?
Windows 10 x64
Nvidia GTX 780 @ 1200 MHz
NVIDIA GeForce 358.50 drivers
Intel I5 2500k @ 4.5 GHz
ASUS motherboard
8 GB Ram
256 GB SSD with OS, Steam installed outside program files, but on this drive.
2560 x 1440 monitor resolution. Playing at 2560 x 1080 because it results better FPS and makes the game more playable right now (but still bad).