Games do not run smooth at 40fps or anything less than 60fps, not even 59. Once a game dips below 60fps stuttering occurs because you are dropping frames. This is NOT the same as micro stuttering. This is simply your hardware struggling to run the game.
You say you get 40-60 fps. So in the times where your fps dips below 60, you are experiencing straight up PC lag not Micro-stuttering.
But what the hell. An easy way to eliminate micro stuttering is to ENABLE V-sync. But in your case since you are getting low fps, you will still experience "stuttering" no matter what you do.
Not necessarily. Skyrim has a lot of weird Microstuttering issues, and it looks A LOT different than what you'd see in other games. My 2nd system is a Phenom 2 x4 3.6GHz with a 6870. With Skyrim, whenever the framerate fluctuates, I get Microstutter. If it's a solid 60FPS, no stutter. If it's a solid 40FPS, no stutter. Going between 45-50? Stutter. No other game on that computer has the issue, not anything using Valve's Source Engine. Not Crysis 1 or 2. Not Battlefield 3, or WoW, or Starcraft 2, or any other game I've played on it. My main system is similar, but different Mobo/Ram and I have a GTX 570. I have no Microstutter with framerate fluctuations with this card. Sure it slows down when the framerate changes, but there's a big difference between the general slowdown you get, and actual "stutter" that many users are reporting with Skyrim. I've been playing PC games for 20 years so I know what general FPS slowdown looks like... this is not it.
I've tried
- Turning off mouse Acceleration in both Skyrim and Windows.
- Windowed mode(which actually fixes a different type of stutter people commonly report)
- Different Driver revisions(11.10, 11.11, 11.11c, 12.1)
- Overclocking and Underclocking both CPU and GPU
- Turning off VSYNC and using a Framerate capper
- Setting different max Framerates with capper
- ENB Performance DLL
- Changing monitor refresh rate
- Changing Flip que length
- Disabling AA/AF, and trying various graphics settings in both Skyrim and my video card's 3d options
- Shutting down unnecessary Windows services
- Deleting Skyrimprefs and Skyrim.ini and letting the game make a fresh one.
Nothing seems to work, except for some .DLL file I found on Nexus when searching for "Skyrim Stuttering Fix 64Hz Bug", however I get awful screen tearing, like if VSYNC was off, but VSYNC is on and my framerate is capped.