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The top panel is secured with five machined screws, two on each side and one on the back. A gasket runs across the perimeter, presumably to help reduce vibration conduction. The underside of the top panel vent has two screws which can be tightened to keep the its action from being too sloppy. As mentioned earlier, the vent rattles a bit when the top panel is tapped.
The top is a flat panel secured by five machined screws. Note damping gasket along its perimeter.
The white box
holds accessories, screws, etc.
The photo below shows the optical drive bay, which is atop the front panel I/O block. Directly behind that is a series of slots which are close to the PSU area. To the right is the back of the VFD and hard drive cage, with intake vents below the cage.
Left slot leads to PSU chamber, below the CD drive tray; right slot goes to motherboard chamber.
PSU mounting area.
A standard ATX12V power supply is meant to be mounted sideways in the back right corner of the case. The rubber-cushioned tab in the center of the photo above is used to jam it up against the right side panel. The PSU is mounted on a separate plate first, which allows it to be mounted to the case. That is the procedure; the PSU cannot be mounted without removing the plate from the case and attaching it first on the PSU.
There are several PSU installation options:
1. A 120mm fan intake PSU, with the fan facing either direction.
A. With the intake fan facing the side vent, you'd have a completely self-contained cooling system for the power supply, like in the Antec NSK2400 or Antec P180 cases.
B. With the intake fan facing the interior of the case, the increased airflow from the PSU fan maye help to cool components, especially the CPU. The expense would be higher temperatures within the PSU itself and a risk of the PSU fan ramping up in speed at a lower load than with option A. The side vent then becomes blocked and useless. The vents on the bottom just ahead of the PSU become the closest fresh air intake for the PSU.
2. An 80mm fan PSU can also be used. In this case, the bottom vents visible in the photo above become the fresh air intake for the PSU, but some of the heat in the case may also exhaust through the PSU. Again, there is a risk of the PSU fan ramping up in speed at a lower power load than with option 1.A.
Here's a drawing from Zalman that illustrates the target airflow design for the case.
The arrow from the front refer to vents on the bottom of the case under the HDD cage.
The arrow that seems to originate from the optical drive area refers to the bottom vent in front of the PSU.
The role of the top panel opening is not illustrated here.
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