Found this post awile ago, I used Fix 3 and it does seem to improve things for me.. maybe it can help someone else.

I too have been one of the unfortunate players who have been plagued with frame stuttering ever since patch 1.4 was rolled out. I have scoured the forums in order to find possible fixes and decided to make this thread which combines most 'good' solutions, and will also mention which solution worked best for my system. For the record, I am running an i5 2500k OC'd 4.4GHz, gtx 680 overclocked, 8GB RAM on Win 7 x64. The game is installed on a 7,200rpm HDD and I am not running SWTOR Unleashed (RamDisk).

Fix #1: If you are running with VSYNC on, try downloading a software called Bandicam and in FPS Tab check the "Set FPS limit" box, then input number 58. This is assuming your monitor refresh rate is 60Hz. Run the game and notice whether there are any improvements.

Fix #2: Run the game in Fullscreen (windowed) mode. Personally I don't like this fix and if you are running SLI/Crossfire then it's no good because you would only be running with one GPU.

Fix #3: Note: This is the best fix which worked for me, it provided the most smoothest experience. If you have an nVidia GPU, go to "manage 3D settings" > "Program Settings" > "Add" (find the swtor.exe from the installed directory) > "Maximum pre-rendered frames = 1" > "Multi-display/mixed-GPU acceleration = Single display performance" > "Power management mode = Prefer maximum performance" > "Triple buffering = ON". The rest of the settings should be left as Default. Make sure you have max-prerendered frames on "1" and Triple buffering = ON as this is what I suspect is making the game run smooth.

Fix #4: In the in-game preferences, locate the Nameplate settings and Disable Nameplate Scaling (although this is not really a good fix in my opinion, ruins the experience.

I am running the latest nVidia BETA drivers which can be found on www.nvidia.com

May the Force be with you