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The ST450NF appears similar to the ST300NF, but not identical. Its exterior is silver in color, made of meshed aluminum panels on four sides, extruded aluminum with very short fins on the bottom, and a thinner solid panel on top. It is actually a bit different from the ST300NF in that there are more open vents all around the unit. In fact, only the top panel (which has the label) is without vent holes.
All four sides are vented with meshed aluminum panels.
The bottom is vented...
...but not the top.
When compared to the ST300NF, the casing of this model has fewer external fins. It appears to rely more on airflow through it rather than conduction of heat to the external panels and convection from there on. The latter is the most common approach to cooling in fanless PSUs. The assumption with the ST45NF is that there will always be some peripheral airflow from other fans in the system, and the vents are meant to take advantage of that airflow. We'll see later what this design does to overall airflow in a typical quiet PC.
OUTPUT CABLES are all sleeved. Note the existence of both dual PCIe connectors and an 8-pin EPS12V connector. This PSU is equipped for some heavy duty work with a modern computer.
1 x 550mm cable 24 / 20-Pin Motherboard connector
1 x 550mm cable 8 / 4-Pin EPS / ATX 12V connector
1 x 550mm cable 6-Pin PCIe connector
1 x 550mm cable 8 / 6-Pin PCIe connector
2 x 500mm cables, each with 3 x SATA connectors
2 x 500mm cables, each with 3 x 4-Pin Peripheral connectors and one 4-Pin Floppy connector
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