This game is seriously flawed, after I got out of Helden, I tried getting more FPS by turning down graphical settings and nothing I did would improve my FPS. I mean, I disabled all forms of AA, AF, I even made the resolution 1280x1024 just for the sake of testing (down from 1920x1200) and I could not get a FPS boost. What is wrong with this game?
What was your FPS prior to this? If it was around 60, that's due to vsync. You'll have to turn it off to get more, but I really don't see why you'd need more than 60 FPS...
Based on your specs, you shouldn't be having FPS issues, aside from the normal CPU death traps. Pretty much everyone lags there. I run Skyrim fine mostly maxed out at 1080p on a significantly inferior rig (Quad core Phenom II @ 3.2GHz & GTX 470). Only time I lag is at the CPU death traps.