Personally I'm a big fan of passively cooled video cards. Although they run hotter, they're silent. They're almost a must for those trying to build a quiet PC, but they're nice to have in any computer case, especially for those with mesh-like cases. If you don't know, passive cooling is basically a big radiator with no fan. Video cards are actively cooled when they use both a radiator and a fan. Active cooling is usually more common because it just plain works better than passive cooling. Sapphire has recently announced a passively-cooled Radeon HD 7770. It remains fully-clocked with a 1GHz core clock, but they had to redesign the board to fit the massive cooler on it.
The redesign comes with the RAM placement. They've simply relocated it to the back of the board, which probably allows for better mounting of the cooler. There's no word on pricing or a release date.