For me I've seen mods cause a drop in framerate that you would not think would do so, such as combat mods, or clothing mods.
I installed the Unofficial Patch the other day and that seemed to improve framerates. Not sure why?
For me it's always a balance between mods I want and performance. If anything caused drop in fps, it's usually gotta go...
But is there a key to load order that might help...
Any advice?