HEC's 6K28BBX585 Mini Tower is great value for people who are trying to build an inexpensive system, or who want to spend more money on the inside. Two 5.25� and one 3.5� external bays plus two internal 3.5� bays provide plenty of room for storage. An 80mm rear fan comes pre-installed. A ducted vent is positioned in the side wall to be over the CPU fan for extra cooling efficiency. There is also a 585W PSU so you can get your system up and running faster. So, load your system up and get back in the game with the HEC 6K28BBX585. With Power Supply: Yes Power Supply Mounted: Top With Side Panel Window: No External 5.25" Drive Bays: 2 External 3.5" Drive Bays: 1 Internal 3.5" Drive Bays: 2 Front Ports: USB 2.0 / Audio Side Air duct: Yes