I wont be buying my new computer until the middle of summer, so in the meantime I need to upgrade the video card on my dell until then. I have a couple questions though. I have a dell 8300 at 3.0ghz, 1gig memory, fx5200 agp. Am I able to use an ATI card with this computer, or am i stuck with Nvidia? Also how do i find out what wattage my power supply is, and would the upcoming 6800gs for agp be a good choice. I heard dells are hard to upgrade, is this true? So many questions, thanks in advance.