Nvidia water cooler fits to X1800XT
 

CHAPS FROM a nice UK company called Vadim.co.uk managed to fit an Nvidia water block to a new X1800XT card. It managed to run that card at 698MHz core and 1584MHz, which is a decent overclock but not a killer. We tried to overclock this card with air but we could not go that far as the memory on the card is definitely very overclocking limited.

http://www.theinquirer.net/?article=27490