My Specs
Core I5 650 3.2ghz
6GB RAM
GTX 560 TI with 296.10 drivers
I am not using ENB series mods, but have many different graphical mods installed through the skyrim workshop. Though honestly, I don't think the mods I have installed are any big performance hitters. I was thinking it could be a Vsync issue, but my iPresentInterval in ini is set to 0. I saw some Vsync options in nvidia inspector, do I have to change those? I uploaded a screenshot of my inspector settings, take a look.
[img]http://img.techpowerup.org/120413/nvidia_20120413_142335.png[/img]


and there is a setting that can increase your fps with 15 or more: disable Ambient Occlusion. Ambient Occlusion was working fine with the 1.4 version of Skyrim. But since the 1.5 version it does not do anything anymore (or just a tiny tiny little bit) so I disabled the AO in the Nvidia settings screen which resulted in a 15 to 20 fps increase but same image quality.