In most cases the default 300-watt Power Supply will be more than enough power. Two High Speed 92x92x32mm, 55.1 CFM Sanyo Denki fans at 2900 rpms. These are for the intake. Three High Speed 60x60x10mm, 21.19 CFM Delta fans at 4800 rpms. These are for the exhaust.
All fans are high pressure to prevent against back air pressure.
Air is forced into the case and not back out the fans. This review and comments are just our personal observations and opinion. As with any products and services, please research thoroughly before making any purchases.