Thanks a lot both of you guys for your advice and info.The initial card I had was the ATI Radeon one, but recently I was given a second hand computer with the nvidia, so that´s why i was wandering if i should replace the ATI Radeon with the nvidia. I tried it to be honest and the results were not bad at all.I know that neither of them is "state of the art" for today´s standards and I plan to buy soon a good one (an nVidia one) but i was just wondering what to do in the meanwhile.Thanks a lot both of youNek