should I upgrade?

[piako]

current psu: SeaSonic S12-430, I also have a pcpc Silencer 470 lying around but it needs some repair

mobo: abit kn9s
cpu: x2 5600+ oc'd
ram: 2gb PC2-8500
vc: Evga 7900 GT KO
pic: nic and sound card
optical: dvd-rom, burner
pump: ddc-12v
hdd: 36gb raptor
fans: 5 120mm, 2 92mm