It's not any of those. If it in fact has a tuner (if the coax connector is
threaded "F" connector attached to a long box on the card then it has a
tuner, if it's an unthreaded RCA connector then it doesn't and is probably
a TV-out) then it would be an All-In-Wonder of some kind.
ATI is no longer listing any drivers for the Rage chips and links from other
sites seem to be broken, suggesting that ATI has removed the drivers from
their site or moved them to a new location.
It being a Dell, your next bet is to plug the service tag number into the
Dell system and see what it comes up with in the way of drivers. If the
board was shipped in the machine then any drivers that are available should
be there. The Dell site does seem to be showing some Rage drivers
including a few for XP, whether your board is supported by any of them I
don't know.
If that fails, you might also try posting a question in the legacy forum at
<
http://www.rage3d.com> and reading the posts there to see if anyone has
any guidance.