Ventilation was clearly one of the main concerns when designing GD04, and it uses a “positive pressure” design, meaning that more forced air enters the case than exits it (i.e., more fans pushing air inside the case than more fans pulling air out of it). This case comes with one 120 mm fan on its left panel (which can be replaced by an 80 mm model), two 120 mm fans on its right panel, a mesh on top where expansion cards are installed and also a small mesh on the left panel. All fans come with a small three-pin power connector, so you can install them on your motherboard, allowing you to monitor their speed through your favorite monitoring program (the case comes with an adapter to allow the fans to be installed directly on the power supply). They feature a dust filter, installed on the side that is facing the interior of the case. They rotate at 1,200 rpm, producing a nominal 20 dBA noise level.
On GD04 the power supply must be installed with its fan facing down and the case comes with a mesh matching this fan with a dust filter that is accessible from outside the case on its bottom panel. However, you need to unscrew this filter whenever you want to clean it. In Figure 6 you can also see how the front stands match those used on audio equipment.
Finally in Figure 7 we have the rear panel from GD04. The power supply goes on the right and the motherboard on the left. There are only four expansion slots and thus GD04 only supports microATX motherboards. Above the place where the motherboard is installed there is a mesh where you can install up to two 80 mm fans and above the place where the power supply is installed there is a slot for ventilation. All slot covers are meshed, which is great to improve airflow.