Consider lowering the iMinGrassSize line inside of your Fallout.ini and FalloutCustom.ini by setting it equal to 40.Consider disabling or not installing Ultra Interior Lighting [This mod adds more lights and effects inside of interiors which can result in lag spikes, especially due to the higher number of shadows that must be rendered.Download these performance mods if you believe they will help you: Buffout 4 [Insignificant Object Remover [Max Performance [and Boston FPS Fix AIO [.A good guide for this is Smoothout - 2021 FO4 Ultimate FPS and Optimization Guide [the contents included there helped me significantly and I urge you to check it out. Tweak your Fallout.ini, FalloutCustom.ini, and FalloutPrefs.ini in order to optimize the game engine.This is because your computer does not have to load these large files (usually high resolution textures) from a separate drive. However, storing your game and mods staging folder on your SSD will decrease sudden, massive lag spikes for your game. If your game is generally laggy with high resolution texture mods or ENBs, storing your game on your SSD will not fix these issues.

A common misconception about running games from your SSD is that it will increase your game's performance (FPS, engine, etc.). Store your game and your mods staging folder on your SSD this is crucial.

Fallout 4 english strings nexus