Okay so I've had this issue ever since i got the game on release.
I have a fairly good Gaming PC that can run most games on high, no issues, with a stable 60-50fps. (ex. Skyrim, Far Cry 3, Black Ops 3, CSGO, Tf2, Witcher 3) Although Fallout 4 has some trouble floating around the 30-40 region on ANY graphical preset.
I don't know why, I know that my CPU isn't bottlenecking my GPU because I checked the CPU and GPU usage while playing FO4 and they are both on max load. (though for some reason they run surprisingly cool at around 30-40c)
Maybe its because my system is an AMD build? I honestly don't know.
If you guys have any suggestions, or you had this exact problem, please let me know. (and yes I've tried FPS configs, they run exactly the same)
My Specs:
CPU: AMD FX-6300
Motherboard: ASUS M5A97 R2.0
GPU: Sapphire Radeon R9 380
PSU: Corsair CX750M
HDD: WD Caviar black 650Gb
RAM: Crucial DDR3 8gb (2x4) (idk the exact name of the ram)