ok, um well, perhaps one of the more experienced hardware guys may step in here. But based upon your boards stats. You "can" get a 16x Pci-e Graphics card. Unfortunately, the Power Supply is at the bare minimum to be able to power it and keep it up. In addition, since your board is currently operating at its slowest piece, (RAM), you arent gonna get much better than 800MHz.

The card I linked is about what you are going to be looking at for the money limit you have. And frankly its core frequency is under the current RAM you have, even though its own RAM is over.

I dunno. If you did find a card, your performance increase may not even be noticable.

Right now, your MoBo and RAM and PWS are killin ya.

My advice would be to use your money, and get a decent board to start with. Then when you can get more cash, buy another component. Then another, and another, till you have a system that you can upgrade later.