Hi. My computer has an integrated Intel GMA X4500 GPU. It's a very good GPU, but it struggles with certain video games that I have. I found two affordable graphics cards on newegg.ca that look like they could work in my computer, if they don't draw too much current. One is a Veineda 6450 and the other is a Maxsun GT 710. I have never heard of these brands before. Are they good? According to techpowerup.com, the 6450 was designed by AMD, and the GT 710 was designed by Nvidia. Would these cards offer better performances than the GMA X4500 I am currently using? Which one is the most powerful?