Ati Pn 109-48300-00 What Other Things Should I Change If I Change My Graphic Card?

What other things should i change if i change my graphic card? - ati pn 109-48300-00

my 512 MB RAM Graphics card is an Intel-128. What should I change if I change my graphics card? Should I, or an ATI NIVIDIA? Is this a good graphics card ... http://www.compusa.com/products/product_ http://www.compusa.com/products/product_ or this ...? Which is better? I am planning to change to 1GB of RAM, but not now