Noctua NH-U9S CPU Cooler
Seeing the NH-U9S, or the lack of seeing anything behind that 92mm fan, should give you an idea of the size of this design. What we can see is that the fan is taller than the cooler and does a great job of covering the fins behind it.
By spinning the cooler around, we can see the fan clips wrap around the front of the fan, across its side, and finally clip into the first notch at the front of the cooler. The majority of the side is flat, with the exception of two spots where the fins are supported to keep spacing correct. The back is designed like the front edge.
Here we laid the cooler down to get a better view of the design at the back of the cooler. Both edges are similar in design, but here the sides support the fan, there is a lowered section in the middle with a saw-tooth pattern, and a final dip in the middle allows the cooler to be mounted.
The fin stack and the fan clip look and work the same on the NH-U9S as they did on the NH-D9L, so we can move lower on this cooler. Here we see three heat pipes very close together near the front of the cooler, and the pair at the back angle off; all of the heat pipes are staggered in the fins to maximize efficiency.
At the top of the NH-U9S we see the offset of the heat pipes as they run through the fin stack. We can also see the leading edge design and its similarity to the back, but since the cooler is offset, we don't need the deep groove for mounting it.
At the base of the cooler we find a plastic snap-on cover protecting the finish. We can also see the solder marks allowing for the best thermal transfer at both ends of the pipes.
Just like we saw when we looked at the base of the NH-D9L, this NH-U9S also has a convex base with a more finely polished surface than most other Noctua coolers. The milling lines are slightly visible, but the plating does fill the voids pretty well.
As we always do when the option presents itself, we added the aforementioned second fan to the cooler. With the additional fan, the NH-U9S is now 120mm deep, and since the cooler comes with an extra set of fan clips, it's almost asking you to add one.
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