ATX Version 3.0 Multi Rail Desktop Platform Power Supply
Fan Requirements - REQUIRED
The fan will draw air from the computer system cavity pressurizing the power supply enclosure. The power supply enclosure shall exhaust the air through a grill located on the rear panel. Refer to Figure 14-2. The movement of the fan to the computer system cavity is to help limit the acoustic noise of the unit.
The fan will be 40 mm.