Hello I recently bought a new gateway DX4870-UB2B. I want to know what is the best graphics card it can run with the stock 300 watt power supply it comes with. I have no price limit as well. Also one more question is there any such thing as a Gigabyte gt 630 2gb ddr2 graphics card. I bought this card, but I searched on the web and can't find any ddr2 only ddr3. Did I get scammed?