If your computer is really a "tower" and not a desktop or small form factor PC, you can use http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&DEPA=0&Order=BESTMATCH&Description=radeon+5570, if you dont' have a tower, looks like this card has the same models in small forms, which should work in the smaller systems. Looks like your power supply is OK for the card also. Although the "recommended" is 400 watts, the max board power is 39, which is probably what the 2400 draws.