Hey guys quick quetsion: I have a HP Pavilion h8-1210 and it will not boot prior to installing the new graphics card... I made sure to unistall any drivers from the original card installed w/ no luck. I also bought and installed a PSU LOGISYS PS480E12 480W power supply with the graphics card. WHAT IS CAUSING THIS PROBLEM?!? also when i switch back to my old gpu it works fine. i dont know what else to do any help would be greatly appreciated Thanks!