Here is how to boost fps on Fallout 4 [xbox].

you will need mods to do so. it will disable achievments so uh yea. all of the following mods do not require DLC's.

Mods (general names, no specifics):

and last one:

}Mild Warning! this may cause screen tearing.{ 720p 60 fps mod

yea, these will bost frame rate to a juicy 60 fps. if only there was a V-sync mod that could aid the 720p mod...