Hi, make sure that you terminate any other program while playing swtor.
Having a browser opened to stream some music or videos can have a big influence in your games performance.
I have a quite powerful machine (i5@4Ghz, 12GB RAM and a GTX 980), yet I creep around 30 fps if I watch streams or VODs on my second monitor. Once I shut down the browser my game returns to 60 - 100 fps depending on the in-game location/activity.