Here is an article on HardOCP, Asus Geforce 3, it is able to be overclocked to 220/545 with stock heatsink, they said it probably could have done higher but they used thier drivers and the OC that they packaged with it only goes to 220/550, here is a link,
http://hardocp.com/reviews/vidcards/asus/v8200_deluxe/
Jim