@YungC1661
Need a bit more info to have a go at solving this:
System specs?
Resolution?
Frame rate? (Min, Max, Average for both mods On & Off).
Gaming on Desktop PC or Laptop?
What mods are you using?
New install or played fine & has just started happening?
Happen all the time in all weathers or only in certain circumstances?
Other games play fine?
Is your Mom hot? If so, what's her number? (that's a joke , probably a bad one).
Any other information you deem relevant?
Give us that info & I'll have a better idea of what might be going on.
Best Guess: You don't have enough RAM. Maybe try Shader Cache: ON in Nvidia Control Panel (not sure of AMD equivalent name) if not on already.