German overclocker Roman Hartung, also known as der8auer, recently took it upon himself to see if an old myth of PC building and CPU cooling actually works: dissipating heat by way of a chimney-style heatsink. To be precise, the myth isn’t anything new and is based on the laws of physics: heat causes hot air to rise, but hot air undirected rises in any available space. Through a chimney, that hot air is redirected and funneled upwards, while also dragging cool air upwards from the bottom. Ultimately, though, der8auer himself concludes that using fans are still the more sensible form of cooling, but at the very least, he’s busted the myth of chimney-style cooling. The end result was a drop of 11°C, from 64°C to 53°C, but that drop also comes with an equally heavy cost in the customisation.