Hexus reports PowerColor is working on a passively-cooled Radeon HD 4850 SCS3 graphics card. This Radeon HD 4850 will feature a cooler with a copper base, 54 aluminum fins and four heatpipes.
The card, pictured above, utilises 54 aluminium fins, an all-copper base and four heatpipes to help keep it cool. The high-rise design, however, rules out users with low-profile HTPC chassis.
Despite the size of the cooler, which will take up at least two slots, we're a little sceptic of its cooling ability. We'd recommend ample airflow if you intend to keep a passive Radeon HD 4850 from frying.
Unfortunately the card isn't offiical yet, it is unknown if this board will be released.