Um, you are on a TH forum. Go to the TH main page and look for it. It's listed on the main page.
Oh yeah, I agree with that, but he is trying to display his computer screen on his TV.
Well, again, I don't know that much about it, but what he is actually trying to do is use his HD tv as a monitor. That, to me, is a bit different than displaying his computer on a TV. If the sole purpose is to just display the TV, then that ATI card will work fine. If he wants to decode HD stuff and run in high res, he'll probably need a bigger/better card.