ATI Cooler

ok guys, i don't know much when it comes to hardware so i need your help 
i was wondering if it would be a good choice to get a seperate cooling fan for my radeon 9800pro. from what i've read i'm not really sure just how necesserary those things are. i mean, will it just reduce the noise or will it actually give better performance through better cooling?
i haven't had this card for long but sometimes i'm just worried i'm frying it
. but if it's more for the noise reduction, i wouldn't really need it.
any advice appreciated

i was wondering if it would be a good choice to get a seperate cooling fan for my radeon 9800pro. from what i've read i'm not really sure just how necesserary those things are. i mean, will it just reduce the noise or will it actually give better performance through better cooling?
i haven't had this card for long but sometimes i'm just worried i'm frying it

any advice appreciated
