Review and testing of a low-profile cooling system Noctua NH-L9x65

Review and testing of a low-profile cooling system Noctua NH-L9x65

Austrian manufacturer of cooling systems continues to develop its line of small low-profile coolers NH-L9. If you recall, the Noctua NH L9 has two versions L9i and L9a itself to Intel and AMD. Height Noctua NH L9 was only 37mm, the radiator equipped with two heat pipes for blowing his answers 92mm thick 14mm fan, of course deal with the serious CPUs Noctua NH L9 could not, but that he is not having a good job of having a CPU TDP 65W.

Noctua NH-L9x65 grown significantly, and now its height is 65mm, the design has four heatpipes, and he was able to cope with processors having TDP 84W, but the most important thing is that the NH-L9x65 now has a universal system of fixtures and supports all current sockets.


The cooling system is put in a small box in a brown-and-white color scheme.

Packing quite informative, for not a short description in eight languages including Russian, brief description of the technical characteristics of the cooler, the information on the scope of delivery and a detailed description of proprietary technologies used in the cooling system.

Inside, two cardboard boxes tucked one with mounting kit and accessories, and the other a little more with yourself cooler, reliably protecting it from damage.

Package Noctua NH-L9x65vyglyadyat as follows:

  • Intel LGA115X;
  • Mounting Kit Intel;
  • Mounting Kit AMD;
  • Package with accessories;
  • Screwdriver;
  • Three instructions.


Before us is a tiny, very neat owlet name that Noctua NH-L9x65. TOP-type radiator design, it blows corporate 92mm fan which has a thickness of 14mm.

The base of the plant with a plastic lid is closed.

The structure design includes four heat pipes with a diameter of 6 mm, two on each side, the heat pipes are nickel plated.92mm fan completely covers a radiator, blowing it completely.

Fan fixed braces, which cling to the deepening in the ribs.

When viewed from above, we see that the heat pipes are the outlines of the letter «S». Heat pipes coming out of the base and bent rush to the aluminum fins are clearly passing through the middle. The distance between the edges of 2 mm, thickness of 0.4 mm fins. In total, the construction can count 51 of them plate 7 was shortened to access the screws fixing the cooler. The result is this picture 7 + 21 + 23 = 51 aluminum plate dissipation area resulting construct is 3050sm2, which is a pretty big mark for the cooler of this size and class.

According to many in the aluminum fins in the heat pipes are in a state of bending each pair is not in contact with the plates 7.

Review and testing of a low-profile cooling system Noctua NH-L9x65

The base is smooth, but a clear reflection it does not see all this because of the methods of polishing the base plate, which is used by manufacturers, this can be seen on most systems, cooling Noctua.

The test print confirms that the base flat.

Noctua NH-L9x65: FAN

For blowing the radiator fan uses a proprietary Noctua NF-A9x14 PWM feature of this fan is the size – 92h92h14 mm and the thickness is 14mm, it is possible to guess the title. This fan also staffed ancestors of today’s hero, coolers Noctua NH-L9i and NH-L9a. NF-A9x14 PWM, like the rest of his relatives has equipped a number of proprietary technologies, one of them is the geometry of the impeller Flow Acceleration Channels . Its essence is that the edges of the blades, there are three notches. The problem cuts to prevent turbulence of the air flow at the ends of the blades of the fan because it appears more quiet operation at medium and high speeds.

In the impeller is nine fairly wide blades. The fan speed is 2500 rev / min, the instance is equal to the speed of waves in 2700 r / min. Also awarded the fan PWM control and can operate with a minimum speed of 500 rev / min. The NF-A9x14 PWM uses a hydrodynamic bearing with magnetic stabilization of the so-called SSO2 , is a proprietary development of the company.

Frame fan has a stepped structure, this technology makes it possible to improve the aerodynamic properties of turntables, will facilitate the transition from laminar to turbulent flow and thereby reduce the noise at the input of the air flow. technology called AAO (Advanced Acoustic Optimisation) .


The company expanded system cooling fan 14mm thick, but it has provided installation 25mm fan, which may get better performance, but this will increase the height of pi till 75mm.

At the edges, there are two lines of depressions, for which cling bracket, the lower is for a low-profile fan, and the top for a standard 25mm fan. Today we test and verify how best to use the fan with the radiator.

Installation of the cooling system is extremely simple, and all have Noctua one of the best support systems. Below the photograph is displayed in detail the process of fastening and assembly installation on LGA 1150.

Once the radiator is installed, it should fasten to the bracket on the fan, below are photos from the native fan Noctua NF-A9x14 PWM. The cooling system is very harmoniously integrated into the motherboard miTX without disturbing anything.

As I said, I will test the radiator using 25mm thick fan – this will Noctua NF-A9 PWM, let me remind you that it has changed the height of the cooling system, it has grown to 75mm, but otherwise everything remains unchanged.

Review and testing of a low-profile cooling system Noctua NH-L9x65

Noctua NH-L9x65: TESTING

Test configuration:

  • Processor: Intel Core i7 4770K@3.7 1,184v (HT enabled, Turbo – included); scalped, cover polished, resulting in a general decrease in temperature was 13-16 degrees with respect to the temperature of thermal interface with the factory.
  • Motherboard: ASUS Impact VI Z87;
  • RAM: Kingston HyperX Predator KHX26C11T2K2 / 8X, 4×4 GB, 2666Mhz;
  • Drive: Kingston M.2 SM2280S3 / 120G 120Gb;
  • Power supply: Seasonic Platinum-1200 SS-1200XP3 Active PFC, 80Plus Platinum, 1200W, 80Plus Platinum; PSU fan running in silent mode while remaining silent most of the time of testing. This power supply has a unequaled high-voltage stabilization is one of the most reliable power supply in its category.

To measure the noise level to use the digital sound level meter, from a distance of ~ 10cm, the minimum limit of the measurement noise is 30 dB, the noise level in the room is equal 30,5-31,5dB given below 33-34dB can be considered completely silent, the error may be 1.5 2dB. CPU used for heating utility Linx 0.6.4 for 7 minutes at room temperature 27 degrees.

Let me remind you that the radiator Noctua NH-L9x65 was tested with two different fan Noctua NF-A9x14 PWM (14mm) and the Noctua NF-A9 PWM (25mm). The speed of the fans has been fitted under the same noise values. The result of the test is shown below.


Miniature cooling system Noctua NH-L9x65 surprised and impressed, she has no trouble with the cooling INTEL CORE i7 4770k. Certainly percent was scalped, but this does not negate deserved an honest victory. Noctua NH-L9x65 become a worthy successor NH L9, of course it is a little higher, but it is compatible with all current processor socket including LGA2011, equipped with high-quality, quiet, productive, long-lived fan which is not nearly as good as its thicker 25mm colleague at the same level of noise .

In general, if short, the Noctua NH-L9x65 an excellent low profile cooling system with huge potential.

Review and testing of a low-profile cooling system Noctua NH-L9x65 updated: May 19, 2015 author: John Malkovich