I'm looking into upgrading my Inspiron 530s for better gaming (I've been told that it was a bad choice of computers, especially for gaming, but it was cheap and I can't take it back now). I've been trying to decide between a few graphics cards the best low profile cards I have found are the Sparkle GeForce 9800 GT (http://www.newegg.com/Product/Product.aspx?Item=N82E16814187061), the Sapphire Radeon HD 4550 (http://www.newegg.com/Product/Product.aspx?Item=N82E16814102819), and the Sapphire Radeon HD 4650 (http://www.newegg.com/Product/Product.aspx?Item=N82E16814102819). I don't know a lot about computers and such so help in this department would be nice. I've also heard that I need a larger power supply than the 530s' standard 250w, but I’m sure the slim case would pose a problem there. Thanks for any help.
I would look at getting the HD 4650. Your link goes to the HD 4550. HERE is an HD 4650. The 9800GT would be too much for your power supply and you cannot upgrade it as it is proprietary on this particular Dell model.