For those of you who have not yet discovered this, this is how i turned my FPS from a solid 15 to 60+ around the diamond city area. (The highest FPS i can get is 72 as that seems to be what the game wants to lock itself at on my system)
-- PC specs --
GPU - GTX 980TI
CPU - I7 6700K
RAM - 8GB DDR4
With the game placed on a SSD (Loading times are still bonkers trust me)
So the solution was simple, when you launch the game and get the Fallout 4 pop up thingy before the actual game, simply go into the, Options > Advanced settings > turn "Shadow Quality" down to low (lower the better), then "Shadow Distance" to medium.
This will make the shadows up close look not so good, however at far it's not too noticeable I've found at least. Upon turning these 2 options to a lower setting i saw an INSANE jump in FPS around the Diamond City area and its surroundings. I AM NOT saying this will work for everybody i'm simply saying this is what has affected the FPS on MY system the most! Hopefully it helps your FPS count out a bit more.
My other settings are as follow:
- Playing in FULLSCREEN (not windowed or borderless)
- 1080p
- Antialiasing is TAA (Best Quality)
- Antisotropic Filtering is 16 Samples
-- Under advanced settings --
- Texture Quality is Ultra
- Shadow Quality Low (as stated above)
- Shadow Distance is Medium (as stated above)
- Decal Quantity is Ultra
- Lighting Quality is Ultra
- Godrays is Medium
- Depth of Field is Bokeh (Best Quality)
- Ambient Occlusion is SSAO (High)
- Screen Space Reflections on
- Wetness is on
- Rain Occlusion is on
- Motion Blur is OFF
- Lens Flare is OFF
-- View Distance --
- Object Fade is at max
- Actor Fade is at max
- Gradd Fade is at max
- Item Fade is at max
- Distant Object Detail is at Ultra
- Object Detail Fade is at Ultra
As a side note i have tinkered with the .Ini files a little only making the FOV 110 and turning mouse acceleration OFF.