Sapphire's upcoming graphics cards will feature liquid metal cooling. The technique is even better than watercooling and according to The Inquirer some test show it will be able to bring a Radeon X850XT PE card to only 12 degrees Celsius.
How it works is very simple, you have some liquid metal and some pipes and metal will actually circle the pipes using electromagnetic phenomenon and will be able to cool the card just fine.
Sapphire showed off some prototypes of the liquid metal cooling at E3 and will launch it in June. More details at The Inquirer