I bought a video card and when I try to instal it, the screen is black, i got Geforce 4 PNY MX4200 and it said need 350 wat power supply, http://www.hp.com/cposupport/persona.../bph06463.html thats the link for my computer and I was wondering if my card is supported with my computer need this anwserred fast!! THANKS in advanced