When first getting the cooler out of the box, the fan that is included is already pre-installed though this will need to be removed to attach the cooler onto the mounting hardware when the time comes.
The NH-D9L features four heatpipes that protrude out the top of the fin array, allowing for maximum cooling performance. Looking at the fin arrays and as mentioned, there are two separate and identical arrays that feature nicely spaced out fins to help dissipate heat quickly and evenly.
There is not a whole lot going on the top of the cooler though a small Noctua logo can be found on both arrays.
The four heatpipes are U-shaped and as such they go through the middle of the baseplate, out the other side and up through the top of both of the fin arrays as we previously saw. This will allow for them to dissipate the heat as quickly and evenly as possible.
Noctua have gone with a mirrored baseplate which when looking at the bottom of the cooler gives it a nice clean look, not that you will see it from this angle when installed, but it is still nice to look at in the meantime.
As mentioned, for fun you can add up to three fans onto the NH-D9L. Why? Well, why not? While most people won’t go this far, it is always nice to know it’s an option and even with the 3rd fan attached to the NH-D9L the cooler still kept it’s RAM compatibility and remained low profile.