i was in your boat about a month ago, i had a radeon 5450 and an intel i5 750 which did just nice for sc2, but for this game it suffered. I was told it was my cpu, but after alot of research learned it was my gpu. Upgraded my power supply and my gpu to a radeon sapphire 6870 and it shreds SWTOR and nontheless BF3 both on high graphics settings. Make sure you have at least 6 gb of ram also. Just make sure your power supply is at least 650 watts and you have the availabilty on your mother board.

sorry, one more stupid question.... what is an npc?

I'm a level 13 jedi on coruscant and I finished the gree mission from the senate tower on coruscant, so now how do i unlock the abilities of the sentinel or a guardian? The sentinel is the one that dual wields right? Do i have to do Another Mission?

I have a level 12 jedi, and i haven't been able to choose my advanced class yet. Went to advanced trainer and it said "nothing to discuss". Is this how i dual wield or use a double sided sabre? Sorry learning on the fly here....