Current specs
W7
4gb ddr3 dual channel corsair ram
Amd phenom II x2 3,2ghz dualcore processor
Radeon 5670 hd 1gb ddr5 gpu

Trynna play swtor, I'm above requirements, i run
On low resolution at max settings,
And it looks good and I get about 25-50fps
But when Im in fleet and other random placeS, the game will
Jerk for a second and drop to 19gps then 50 then 39...etc

How to stop this?
I set my paging file to 100gb so I have like 107gb virtual
Memory according to specccy
And 70% physical memory usage.
So will adding more ram help?
I also use diskkeeper tools to keep my hdd fast.
And am malwayre free

TyIf your computer is a generic or custom built machine we need to know the model number of the motherboard

If your computer is store bought or generic then we need to know the model of computer..

Minimum requirements for game / Recommended requirements, age of computer, how often do you use it, do you use it just for gaming, type of connection, do you have anti-virus running in the BACKGROUND, are you running other programs while you play, cpu usage, memory consumption etc..

The more information you can provide us the better we can assist you, however not all computers can be upgraded beyond its current capacity.
What MBoard ? ?Which version of Windows 7 are you running 32 or 64 bit. You might find that your only using 3GB of Ram if you have Windows 7 32-bit installed, in which to address more than 3GB you have to upgrade to Windows 7 64 bit. Seen some people out there get bit by this before where they buy a name brand computer and it claims it has 4GB RAM and then the OS is Windows 7 32-bit in which not all 4GB is able to be used and performance lacks.Good evening STC

all of the posts here are correct but I also have a couple of suggestions & a couple of questions. You have given us here 80% of your specs but in order to help any more a bit more info would help.

Questions
#1... How big is your power supply (VIDEO card may be starving for more juice)
#2... What MoBo (motherboard model) or computer model (i.e like a Compaq SR5001 etc) (MSI-7529 etc)
#3... What bit version of windows: Windows 7 32 bit or Windows 7 64 bit (Windows version like Home prem or Basic makes no difference)   
#4... With the varying frame rates: is this on-line game play or local (only being played on PC against the game it self) I don't know if the game has a local game play option. There has been server (swtor) issues while playing game on line.
#5... Have you adjusted other options in the game, anti-aliasing, shadowing etc.
#6... You using a CRT or LCD if you have a lower END LCD you can get ripping / tearing etc this may not / should not affect frame rates but can and will affect the image on the screen. 

Suggestions
#1... Is there a patch available there may be a fix that covers multi issues of game play.
#2... If you are running a 32 bit of W7 like stated in other posts even if you have 4 gig's the OS will only use / access is 3 to 3.5 gig's max for the OS to use take advantage of 4+ gig's is to use a 64 bit of W7.
#3... I do under stand you adjusting the windows page file, but you really should let windows handle that. Changing the page file YEARS ago was wanted / needed sometimes but with 3 to 4 gig's or more it really may not be needed but in some cases can help . (the page file basically a swap area (INCREASING and decreasing when needed) of windows in-case the computer runs out of physical memory)
#4... Checking the manufacture site forums there may be thing they have run across that we may not be aware of. Here is the link http://www.swtor.com/community/
#5... if this issue happens only when online playing make sure your firewall / ports are configured for it.
#6... Have just as few as possible programs running in the back ground as possible.
#7... If this PC is a custom PC and say the MoBo model is "MSI-7529" etc there maybe a BIOS update to make the OS see the correct amount of ram. Even if you installed 4 gig's the OS may be using / seeing a lower amount. 

Please come back and let us know what the fix was, Thank you Mike 

Run this instead for a complete information of your PC.
Download Speccy and then install the program.  To post and publish a snapshot of your PC.
. In the Menu bar, click File -> Publish Snapshot
. Click Yes > then Copy to Clipboard
. On your next reply, right-click on a empty space and click Paste on reply box then click Post.

Not sure anyone noticed...but he has yet to return. Quote

Not sure anyone noticed...but he has yet to return.