I had a Geforce 4 Leadtek card for 5 years, the only thing that happened is fan crapped out about 2 years ago, and I slapped an old cpu fan I had on it, and it ran fine for two more years, actually never stopped running fine I just decided to upgrade. I highly recommend Leadtek cards from my experience at least.
My last two vid cards were Leadtek. I have a GeForce 3 Ti 200 that is 6 years old and still in use in one of my older P4 machines - fan is still kickin' too. I also have a 7800gtx that is 18 months old and running fine.