Noctua NH-U12S Slim Tower Heatsink

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The NH-U12S is composed of a copper base, five copper heatpipes, and 50 aluminum fins, all nickel-plated. With the fan installed, it measures 158 x 125 x 71 mm or 6.2 x 4.9 x 2.8 inches (H x W x D) and weighs 750 grams according to our digital scale.

The stock fan is equipped with dampening pads on both sides to limit vibration from interaction with both the heatsink and the fan clips. By default, the fan is positioned a bit high on the heatsink; lowering it would improve board cooling.

Compared to the U12P, the U12S' heatpipes are spread further apart from one another. Each pipe gets more air blowing around them but airflow through the fins faces increased impedance.

The heatsink's fins are packed much tighter than Noctua's previous towers. The fins are 0.45 mm thick and spaced 1.72 mm apart on average.

Like most Noctua heatsinks, the surface is convex though the bump at the center is less pronounced than previous models. To the naked eye, it looks almost flat.

The base has a fine but not quite mirror finish. Oddly, the holes for their previous revision of mounting clips remain, a relic of the olden days.

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