The Sapphire TOXIC X1900 XTX offers you all the benefits of watercooling, with none of the extra work usually associated with setting one up.  [H]ard|OCP has the full review of the card, and the reservior/pump/radiator that fits right into a PCI card slot.
“A self-contained liquid cooling system built around an ATI Radeon X1900 XTX GPU? Sapphire has engineered a user friendly liquid cooling system using the fastest ATI GPU overclocked right out of the box. We evaluate performance compared to the competition, heat and overclocking.”

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