So I think I found what the fuss with all graphics problems are about.

It seems to be the water and I suggest you test is extensively yourself BUT water is at places it should actually not be.

Open the console command and type: "tcl" to get collision turned off then go to a place with lots of water and look at it, if my theory is right the FPS drops massively.

but its not because of its just water on the surface, Its EVERYWHERE use the "tlc" command to get under the map like a good 100 to 200 meters below the surface and see how much water there ACTUALLY is.

when you look at 1 "water box" as i'd like to call them (since the places with water are basically appearing as white boxed below the map) its just fine and renders okay BUT when looking at 2 of those water sources the FPS drops to around 30 to 50 on my GTX 970 G1 by Gigabyte (and if it matters i7 4770K CPU) and when you look at no water AT ALL its just fine at 200 FPS max or 150 average.

I HIGHLY reccomend you try this yourself and verify this info but I really think I got something here and I want to share that with the community and push it to bethesda because I don't like my games going from 60 to 20 fps, its aleady a pain to have Physics tied to FPS (as in if in building with 200 fps you move like a space shuttle)