A traditional IceQ cooler with a turbine on one end that drives air through the heatsink and out of enclosure. Such coolers are usually very quiet and effective. Let me say that this graphics card worked fine at the 5770 clock rates. Overclocking it from 700 to 850 MHz resulted in no issues, and the cooler performed just fine.

A finned oval heatsink with a large and slow fan in the middle. This cooler is almost noiseless.

A similar cooler, only the heatsink is rectangular. Reinforced with a copper plate. Nearly noiseless as well.

Yet another similar cooler. Nearly noiseless.

Vaporizing chamber is the key feature of Vapor-X coolers. Liquid coolant vaporizes on the hot surface, the resulting vapor condenses on the cold surface, and is taken to the hot surface again. This recirculation goes on inside a degasified chamber, controlled by a complex capillary system. Vapor-X chambers are very thin, mounted directly on GPU crystals.

This solution only cools the core, so a large heatsink with a slow fan in the center is added to help cool the rest. This solution is noiseless.