Raven Revolutionizes Airflow If you build a custom water cooled PC, airflow isn’t a huge concern. As long as you have enough radiators, chances are your components will stay nice and cool. If you have air cooling however, optimized airflow is an absolute must from a PC case. The typical design from most cases is pretty mundane. SilverStone is turning case design on its head, almost literally, with a new Raven prototype at CES.