A lot of people with both AMD and Nvidia have been complaining about stuttering when they had good fps.

Well I believe I have found a fix for your problem (It works for me but I can't guarantee anything).

Now then, this is not a one time fix and must be done every few days to keep your game running fluently.

People have found that the disableloadingmip0 fix has helped them bur it has sacrificed their textures and hasn't completely removed the problem.

Now I bet you are all eager to be playing in a lag free environment so lets do this.

Make your way over to "C:\Windows\Temp" and remove all files and folders!

And we are done.

If you are wondering I am using a gtx 750ti, i5 4440s and 8gb ram.

I am also running at ultra with hbao+, enhanced godrays and 768p (Gains 15fps over 1080p)

Enjoy.