It is very likely that you have more than enough horsepower for the card and basic software.
If you plan on using some of the fully integrated offerings to display, then I can't speak for sure. I would say yes, but with 1 meg and a pent 2 running XP and doing ok, I'd think that it would be sufficient.
Do you have a card and antenna? I might have one around here I'm not using.
Dale
K9ELD