Hey guys, I have an older HP Pavilion a1034n and I've been considering upgrading my video card since this one is a little bit older. I've already upgraded my ram up to 3GB and have a 450 Watt power supply installed too, this computer is running smoothly even with windows 7 I've taken care of it pretty well and I would rather not have to get rid of it. My question is how do I know what video cards are compatible with my computer?