I have to ask, what mods are you using and is the game playable?
All I'm using is Morrowind Graphics and Sound Overhaul (MGSO) with distant land (30 cells) and the most intensive shaders, except depth of field, because I don't like it during normal gameplay. I used ReShade once for monochrome, contrast curves and black/white levels. I'm running the game with 4x MSAA with 4x supersample transparency AA. For screenshots, the game's running at 3840 x 2160, but for normal gameplay I go with 1080p because the UI doesn't scale with resolution. If it did I'd play at 4K, because I'm usually sitting at around 50 FPS there. At 1080p, 60 FPS is obviously not a problem.
As for my specs, I've got an i5 4690K (stock clocks), a slightly overclocked GTX 670, and 8GB of RAM. Running the game off an incredibly old and slow HDD and I don't get any stutters of any kind. When I was using an i5 750 I noticed quite a massive drop in performance, probably due to the big difference in single thread performance between the two CPUs - interesting how a modded copy of such an old game can hog the CPU to such a degree.