GIGABYTE has released a Radeon HD 4850 with 1Gb of graphics memory and, most important, with a really efficient passive cooling system. Gigabyte calls it Multi-Core cooling system.
This cooler is really efficient because it’s able to keep temperatures very
low: 37°C in idle and 61°C under load. Under load, it’s common to see temperature above 80°C for a Radeon HD 4850.