quote: Its weird that there aren't more case designs with vertical cooling built in mind.
quote: my six year old Mac Pro running four hard drives and two graphic cards is complete and utterly silent and never overheats. I can only tell if it is one by looking at the power indicator light. That's how good the cooling is.
quote: Also, I'd need to do some calcs but my intuition says a circular shape is the worst shape for this....The pics however make it seem like they're not even doing that, and there's a huge open triangular region in the center where air will just pass through without cooling anything. I truly hope they have vanes running through that central space.
quote: It's because it's a non-optimal configuration which makes airflow perpendicular to heat flow, instead of parallel to it
quote: components higher up your chimney will have less cooling because they're getting air that's been warmed up by components lower in the chimney
quote: Ideally you want airflow to be parallel to the flow of heat. e.g. heatsink fan sucks in air through the sides of the heatsink and blows it out the top. So the heatsink is hottest at the bottom (closest to CPU), coolest at the top. Air is coolest at the bottom, hottest at the top. That makes the heat gradient consistent across the air temperature gradient (a certain temperature air always sees the same temperature metal), providing uniform cooling.
quote: Also, I'd need to do some calcs but my intuition says a circular shape is the worst shape for this. To maximize heat exchange, you want to maximize surface area presented to the airflow. A circular cross-section minimizes surface area encountering a given volume of airflow.