I am looking into upgrading my graphics card. My computer is a bit old at this point and needs to be replaced, but since that is not feasible at this time I'm trying to get the upgrades no matter how small where I can.
I'm almost certain it will work in your system, but you might be bottle necked a small bit, I don't think overclocking is really an option either. 3g or Ram is that 3 sticks?
if you have more than 2 it wont utilize dual channel that might hinder performance.
Then again your mobo might not have dual channel, but more than likely it does.
And lastly yeah psu needs an overhaul for sure, get a good brand because you will need it when you upgrade your whole system later.