Dagnabbit, they stole my
bottom-sucking intake & psu airflow isolation setup. Who do I sue for royalties?
Thanks for the reminder about your quiet wood case, Doug. I trust it's still working well? I prefer the aesthetic of your case, but I think Silverstone did it differently enough to sidestep your lawyers...
I knew this review was going to raise a few eyebrows or even hackles from regular readers, but we really have to pay attention to the intended markets. With the Raven there's no question it's meant to be a power/game user's case, and the acoustic aspect is almost always takes a back seat. There was no point to doing detailed acoustic analysis with super quiet components. The silence fanatics can easily figure out what the residual noise floor of this case is: The two fans running together at 500~600 rpm won't produce more than 15~17 dBA in the case, and still provide a good amount of cooling airflow. With a quiet enough PSU and HDDs, <20 dBA is easily achievable.
As to how effective its cooling is, in truth, I doubt it's much better than a conventionally oriented case with say 2 120mm fans at about the same noise level. Why? Because the exhaust area is no better than any number of conventional cases. Actual impedance of airflow may not be an issue until the 18cm fans are at nearly full tilt though. Even at full speed, they don't seem to move that much air -- not surprising considering the low 700rpm top speed. (But they do become noisy enough that I wouldn't ever run em that high.) To take full advantage of the convection-friendly design, you'd want to use heatsinks with big fins oriented for maximum exposure to the flow.
Consider that many users have found using the top fan in the P18x series as an intake to provide the best cooling. That's the counterpoint to convection, the gist being that you need a lot of heat and high temperatures to create a smokestack effect. There have been detailed discussions and hands-on experiments by forum members on this in the past. Someone will remember and find the link, I'm sure.