Don't bother seeking FPS in Planetside 2, it isn't well optimized and people running on really high end machines are stumbling around 50 FPS
Depending on which Phenom II you have (could you get a specific model number? use Speccy or something) you may or may not need ot update that, I would say your graphics card is outdated, I'd recommend getting something like I have, an AMD 7850, it's fairly cheap now and still very powerful, also if you don't have 4GB of ram, aim to upgrade your RAM - 8 GB is decent amount and while you won't need it all right now I imagine soon we'll start needing around that much
so ya