Well, if you have a very Powerful Pc (including videocard), you might want water cooling supply,But it is quite expensice. but if it is something normal, jsut get a new fan, and put it near the videocard. they are not expensice, worth Every penny.
you got a softwear that controls fans and tell the temparature? if not, yo might want to get one, they work great. (Speedfan is a good softwear)
Chris