The ENB has it's own EdgeAA+FXAA, SSAO and AF, otherwise it would give you errors like 'Hardware Antialiasing detected.Quality reduced.' ,decreased performance, invisible walls, flickering, black or no eyes. Look here and here for Nvidia, for AMD it works similar.

c) Set MSAA(Antialiasing) / SSAO(Ambient Occlusion) / FXAA(Fast Approximate Anti-Aliasing) / AF(Anisotropic Filtering) to 'off' in game settings AND to 'Application-controlled' in videodriver! (Skyrim FXAA works but will decrease your sharpness) MO users should run Skyrim Launcher within MO. To uninstall RealVision files simply start RV_uninstall.vbs, but do this before you deactivate RealVision in NMM, Wrye or MO! Tutorialvideos: NMM / Wrye Bash or MO Warning: Script erases and overwrites previous enbseries and SweetFX folders! OR download the single file for your preferred option, extract it somewhere and copy all files and folders to your 'Steam/SteamApps/common/Skyrim' or where TESV.exe is located. After that don't forget to open Steam/SteamApps/common/Skyrim/Data/RealVision_ENB_files and start RV_install.vbs! MO users' RealVision_ENB_files folder will be in Mod Organizer/mods/RealVision ENB (version) This Script will copy all files for your preset to Skyrim-mainfolder automatically. copy d3d9.dll AND enbhost.exe from wrapper-folder to Steam/SteamApps/common/Skyrim or where your TESV.exe is located b) download RealVision ENB with NMM, Wrye Bash or MO, activate it and install the option of your choice. A) download ENBSeries v0.251 (enbseries_skyrim_v0251.zip) from or ENBSeries archive and extract it somewhere.

Skyrim sweetfx flickering