Topic moved to the Troubleshooting section, this is a problem not a tutorial.
Make sure you have anisotropic filtering enabled, ether from the launcher or forced in the enblocal.ini file.
ENBoost is installed with ENB as its part of it, open your enblocal.ini and you'll see a [MEMORY] section, set the VideoMemorySizeMb to how much VRAM you have and play with the values until you find something that works for you.
Set ExpandSystemMemoryX64 & ReduceSystemMemoryUsage to true first and see if you get any stutter.
I hope this helps.