Plus, the SLK-600 heatsink is for the SK-6 heatsink what the SLK-600 car is for the rest of Mercedes' S class, a turbo version. And if you compare the two you'll see I am right, the SK-6 is a skinny heatsink compared to the SLK-600. Anyway, the name is not very important since Thermalright claims that the SLK-600 is the best 60mm heatsink. I guess we'll see about that. As all other Thermalright heatsinks, the first thing that impressed me is the box. I don't know why, but Thermalright packs their heatsinks in big brown boxes that make you think you've just bought a very pricey collector's item or something, but not a heatsink. But as I found out the SLK-600 is not just any heatsink.