Hello Vegeta535, Your graphics card will still have the 3 year warranty valid with your waterblock installed. In the event warranty options need to be explored in the future, you would have to reassemble the card back to factory condition with the original air cooler for us to accept it for the RMA. Any liquid damage exposed to the card with your water-cooled components or physical damage due to the misuse or installation of your own cooler (or the re-install of the air cooler) are not covered under warranty.