I have a compaq computer where the ati graphics card is integrated into the motherboard. It is the ati radeon x200 or something along them lines, and now I want a vid card where it can support HD output. Will I need a new motherboard to achieve this. The computer is approx 1.5 years old.Just curious cause id like to run my computer to my big screen HDTV and play HD content. Thanks for anyhelp!