ZOTAC GeForce GTX 660 Thunderbolt Graphics Card Pictured@ 2013/01/31
The cooler may look like yet another aluminum fin stack ventilated by two fans, but it's in fact a chunky monolithic aluminum heatsink, with heat-transfer bolstered by three copper heat pipes. It's hence a hybrid between heatsinks and fin-stacks. Heatsinks give you the convenience of easier cleaning as spacing between their ridges are greater, and are generally more rigid. To make matters better, the cooler features what ZOTAC calls "EClean." In the pictures below ZOTAC demonstrates how its hybrid heatsink is better than fin-stacks.