Noctua NL-LC1-36 and NL-LC1-42 Liquid Coolers Review: Impressive Performance
Introduction

Noctua has landed in the water cooling market with three liquid coolers:
- NL-LC1-24 [240mm]
- NL-LC1-36 [360mm]
- NL-LC1-42 [420mm]
Noctua has used the high-performance, flagship pump Emma V2 Gen 8 from Asetek. Noctua has customized the pump housing design to absorb maximum sound coming from the pump by introducing three layers of acoustic foam. Focus of Noctua and Asetek is clearly on the pump, which is the heart of any cooling solution – in addition to the other components.
Noctua has also introduced three modes for the pump motor speed. An integrated temperature sensor based on the loop’s temperature is introduced, against which the safety measures are factory-set. Units are designed in a way that they self-bleed at every startup, reducing the risk of air bubbles trapped in the pump.
The radiator uses non-louvered fins, which makes them ideal for Noctua NF-A12/14 PWM G2 fans. EPDM tubes are used with a low permeation rate. Each size of the cooler comes with related NF-A series fans corresponding to that size. The base of the pump housing features a CU100 copper-based cold plate. It is not nickel-plated.
Optionally, you can buy the NL-ACF1 fan that would come in handy for near-socket component cooling. The fan uses a magnetic attachment, making its handling super convenient. I was expecting to see the chromax.black edition fans on these coolers, but Noctua has stuck with standard colors. This means the chromax edition of these coolers is expected anytime. These coolers are compatible with AMD AM4/AM5 and Intel LGA 1700/1851/1954 [Future-proofing].
Noctua offers 6-year warranty on these coolers. I will be covering 360mm and 420mm in this content. The MSRP of NL-LC1-36 is USD/Euro 249.95, and that of NL-LC1-42 is USD/Euro 279.90. These are steep prices, which Noctua may need to reconsider if these coolers have to compete in the diversified liquid cooler market. You would see many LCD display coolers costing less while offering more bling in a cost-effective manner. Noctua’s argument would be strong low-noise performance that is hard to compete against.
Specifications



Packaging and Unboxing






The coolers come inside a cardboard box which has Noctua’s standard color theme. Egged carton holds the cooler and accessories for safe shipping. Once the box is opened, you can see an overleaf that has a Noctua logo plate in the center. The fans are provided in a separate box. They could have been installed on the radiator in this price range, as per current trends. The accessories are provided in a separate box, which we are accustomed to.


The following accessories are provided:
- NL-LC1-36 closed-loop liquid cooler with NL-PNA1 pump noise absorber [For 360mm]
- NL-LC1-42 closed-loop liquid cooler with NL-PNA1 pump noise absorber [For 420mm]
- Metal Noctua logo faceplate
- 3x NF-A12x25 G2 PWM fans with speed-offset (PPA/PPB/PPA) [For 360mm]
- 3x NF-A14x25 G2 PWM fans with speed-offset (PPA/PPB/PPA) [For 420mm]
- 3x NA-AVG1 anti-vibration gaskets (pre-installed)
- NA-SC1 3-way splitter cable
- NA-EC1 30cm extension cable
- Fan and radiator mounting screws (Torx® T20)
- SecuFirm2+™ multi-socket mounting system with offset options for
- AMD AM5/AM4 and Intel LGA1851/1700
- NM-SD1 Torx® T20 screwdriver
- NT-H2 thermal compound
- NA-CW1 cleaning wipe
- NA-TPG1 thermal paste guard for AMD AM5
- Noctua metal case badge
Closer Look
It is time to take a closer look at each component of the main units starting with the radiators.


The NL-LC1-36 has a radiator size of 399.5x120x30mm with a total thickness of 59mm with the fans. The NL-LC1-42 has a radiator size of 459.5×143.7x30mm. It also has the same total thickness of 59mm. The fin stack has a 20 FPI count and comprises 12 channels for coolant flow. There is 105mm standard gap between any two opposite end mounting holes.
Noctua uses non-louvered fins, which have low flow impedance, making them suitable for NF-A12/14 PWM G2 fans, which generate less air velocity at high speed. The overall build quality is good and I did not see any bent or broken fins.

The tube connections on the radiator housing are well concealed using black rounded clamps. The gap between these connections is considerable. The near head does not have any serial number sticker or other data. The far chamber has this data.


Noctua uses Astek x Noctua branding on the side frame of the radiator. Noctua has used EPDM tubes with low permeation rate so that they last for good given the warranty period of 6 years. The NL-LC1-36 has a tube length of 410mm where NL-LC1-42 has a tube length of 450mm. The outer diameter is 12.5mm and the inner diameter is 7 mm, with a minimum bend radius of 26mm. Speaking of the coolant, it comprises 22% propylene glycol and 78% water. Its inhibitors include Anti-Freeze, Anti-Corrosion, and Anti-Biological.
Block/Pump Head




The pump housing is almost circular in design. The pump top height is 70mm. You can see an inset over the top with Notua branding in the center. This is where you will place the bundled metal plate. The embossed logo helps the user identify the right orientation of the metal plate. This is magnetic mounting. The cutout with a further inset is useful for removing the metal plate. The power cable comes from the side of the main housing.


Noctua has provided a spring-loaded screws mounting mechanism in the pump housing. They have smartly provided insets on the sides so that a screwdriver can easily access the screws without affecting the overall dimensions of the housing. You won’t see any branding on all sides of the housing.



Noctua has implemented a mechanism to reduce the pump noise to max for which they have used the NL-PNA1 pump noise absorber, which integrates three layers of acoustic foam. Acoustic Foam is deployed to absorb high-frequency sound waves. It is a soft and porous material. The NL-PNA1 pump noise absorber can improve acoustics both by reducing sound pressure levels (SPL) and by shifting the pump’s sound signature towards lower frequency ranges that most people perceive as less distracting.
The first layer is of acoustic foam, which absorbs high-frequency sounds. The major component is a dense barrier, which is a second layer. It blocks and reflects the sound waves. The final layer of acoustic foam isolates the dense barrier from the substrate. These barriers are installed over the pump motor inside the housing.

The backside of the pump top has tube connections in 90° and can be rotated sideways. The tubes are flexible, and sliding the tube connection is convenient as well.

The slider button is located on the rear of the pump housing. You can also see porous acoustic foam right above the switch. The pump profiles include:
Quiet: 750 to 2100 RPM
Balanced: 750 to 2600 RPM
Manual: 750 to 3400 RPM

The pump is PWM regulated. However, complete PWM range is only available under Manual mode. As mentioned above, these units employ the Asetek Emma V2 platform with Gen8 pump. This pump uses a three-phase motor with a centrifugal impeller type and a ceramic sleeve and shaft.
Safety Features:
Noctua has integrated a sensor in the loop to monitor coolant temperature. Some important safety-related aspects are:
- The pump will not go below 750 RPM even if the PWM range is set below 20%.
- The pump has a nominal minimum speed of 750 RPM (20% PWM). It will operate at this speed as long as the liquid temperature remains below 45°C.
- If the temperature crosses 45°C, the speed of the pump will start increasing accordingly automatically.
- As soon as liquid temperature reaches 55°C, the pump will automatically operate at its full speed of 3400 RPM.
- If the pump detects 0% PWM signal for any reason, it will operate at full speed.
- On every startup, the pump will run at its full 100% speed for some 50 seconds to bleed the loop, and then it will come down to the user-set mode.


These coolers using the Emma V2 platform feature a cold plate made of 99.95% high-purity CU100 copper. The cold plate has a large 32.5×22.5mm array of skived micro-fins. This is a dense fin stack providing better thermal dissipation and coverage of the die. A distributor is used for even flow of coolant on both sides of the cold plate.
FANS


The NL-LC1-36 comes with three Noctua’s high-performance next-generation NF-A12x25 PWM G2 fans. The NL-LC1-42 comes with three NF-A14x25 PWM G2 fans. We have already covered these fans in detail in separate reviews; hence I will not go into the details. Click on the names of the fans above to check the dedicated reviews.
Installation

Noctua did not reinvent the wheel here; rather relies on its tested and trialed SecuFirm2+ mounting kit for the liquid coolers. This is a wise move. Noctua wants to prevent any flex in the mounting parts that could impact the contact pressure. However, this results in Noctua using a two-point contact method.



The mounting kit offers offset mounting options for both AMD and Intel platforms to maximize performance via direct coverage of the hot spot areas/die on the respective SKU.
Overall, installation is simple and convenient, and I did not notice any issues during installation and removal of these coolers.
Clearance
Make sure your PC Case has clearance for 360mm and 420mm coolers, particularly the 420mm, since not all cases support this size.
Noctua NL-ACF1 Fan






Noctua has also provided an optional accessory for these liquid coolers. This is a pump top-mounted fan that blows air towards the near socket area, including the VRM, RAM, and M.2 SSD, and even the EPS connectors.
According to Noctua, the near-socket components do not necessarily require additional cooling, but providing extra airflow to them makes it possible to keep them at the same temperature levels while reducing the RPM speed of case fans.


Installation of this fan is quite simple. It has magnetic placement. Just put it on the pump top and connect the PWM cable to the fan header. Yes, you will need an additional fan header for this fan if you want to regulate it manually, or you can combine it with other fans, subject to power ratings.
Testing
The following configuration is used for thermal testing:
- AMD Ryzen 9 9900X
- ASRock X870E NOVA WiFi
- GSkill TridentZ NEO RGB 32GB 6400MHz CL30 DDR5 kit
- ASRock Phantom Gaming RX 7600 Graphics Card for Display
- Biwin Black Opal X570 Pro 4TB NVMe SSD
- Fractal Design ION+ P2 860W Platinum
- Thermaltake Core P6 TG Snow Edition in an open frame layout

Here is the settings table for testing:
| Settings | PBO Enabled [243W] |
| Clock (MHz) | Auto |
| Voltage (V) | Auto |
| Thermal Paste | Noctua NT-H2 |
| Thermal Paste Application | Dots Method |
| Test Run Time | 30 minutes |
| Idling Time | 10 minutes |
| All Fans Speed | 100% PWM Duty Cycle |
| Pump Speed | |
| Stress Software | CINEBENCH R23.2 |
| Monitoring Software | HWINFO64 |

I am reporting absolute temperature in the graph because the room temperature was at 22°C throughout the day. The testing is done on an open-air bench system. Once inside the chassis, the temperatures are expected to rise and would largely depend on the optimal airflow inside the chassis.
Result

I have tested NL-LC1-36 using all three modes (Quiet, Balanced, and Manual), whereas the NL-LC1-42 was tested with Manual mode only. Also, the VRM fan is tested on the NL-LC1-36 only to make its case. In quiet mode, the NL-LC1-36 reached 80.9°C with only 0.2°C margin over the Game Max cooler.
The NL-LC1-36 in Balanced mode did 79.7°C, competing against the former topper of our graph, which 420mm cooler from DeepCool. The NL-LC1-36 did a fantastic job of 78.5°C in manual mode, making it a number one performer in the 360mm category. The NL-LC1-42 did marginally well comparing with NL-LC1-36 but it is right now on the number 1 slot in our graphs.
The selling point here is the noise-to-performance ratio. Noctua coolers with fans and pump at 100% PWM range are silent compared to other coolers in the graph. This is what makes these coolers a compelling, excellent cooling solution for your requirements. Clearly, these coolers have more head room for higher TDP.
Conclusion
I remember the days, when I used to install Noctua fans on Corsair AIOs for better acoustic and thermal performance. Fast forward to 2026 and Noctua makes its entry in the liquid cooler segment. This entry, though expensive but brings an excellent and powerful cooling solution on the market while sticking with Noctua’s colors. The new coolers are named NL-LC1, followed by a two-digit code representing the size of the radiator like 24 for 240mm, 36 for 360mm and so on.
We have tested NL-LC1-36 and NL-LC1-42 coolers this time. These are 360mm and 420mm size coolers that are compatible with AMD AM4/AM5 and Intel LGA1700/1851/1954 sockets. Noctua has bundled its high-performance NF-A12x25 PWM G2 with 360mm cooler and NF-A14x25 PWM G2 in 420mm cooler. These are the best fans from Noctua at present and provide an excellent noise-to-performance ratio.
For the pump, Noctua has employed the Asetek Emma V2 Gen8 platform, which is Asetek’s flagship pump solution for liquid coolers. Noctua’s customization comes in the form of three layered sound dampening/noise absorbing foams with a dense barrier that sits right on top of the pump inside the main housing. This pump uses a three-phase motor with a centrifugal impeller type and a ceramic sleeve and shaft.
Noctua has introduced three modes for pump speed regulation: Quiet, Balanced, and Manual. A slider switch is provided on the rear of the pump housing. For a complete and wide PWM range, use Manual mode. In our testing, the quiet mode also provides highly competitive performance from these coolers.
An integrated sensor monitors the liquid temperature and uses built-in safety features under certain conditions like pump operating at 100% PWM range if the coolant temperature crosses 55°C. Similarly, when coolant temperature starts crossing 45°C, the pump speed also starts increasing accordingly.
The NL-LC1-36 features an aluminum radiator of size 399.5x120x30mm, whereas the NL-LC1-42 has a radiator size of 459.5×143.7x30mm. Both have a total thickness of 59mm each. Noctua has used a non-louvered fin design.
The EPDM tubes with low permeation rate are used on these coolers. The NL-LC1-36 has a tube length of 410mm where NL-LC1-42 has a tube length of 450mm. Speaking of the coolant, it comprises 22% propylene glycol and 78% water.
Noctua has also introduced an optional fan accessory named NL-ALF1, which can be mounted on top of the pump housing for additional airflow to near-socket areas. In our testing, this fan reduces the VRM temperatures from 57°C to 48°C at the same thermal load and ambient temperature. It also reduces the temperature of EPS connectors by 8°C, showing its practicality and usefulness.
Noctua has used its SecuFirm2+ mounting kit. This kit also offers offset mounting for AMD- and Intel-supported sockets for maximum cooling potential. This kit requires 10 items to install mounting hardware on an AM5 socket. The cooler uses two-point contact.
Coming to the question of the actual performance of these coolers, the graph is self-explanatory. The NL-LC1-42 and NL-LC1-36 are sitting on top of the graph using manual mode. The NL-LC1-36 with its balanced mode, offers competitive performance against a 420mm AIO from the competition. All in all, these coolers offer an excellent noise-to-performance ratio with good TDP headroom.
Pros:
- Excellent Thermal Performance
- Asetek Emma V2 Gen8 Pump
- Three Layers Foam Coating
- Integrated Thermal Sensor
- Built-in Protection Features
- High-Performance NF-A12/14×25 PWM G2 Fans
- SecuFirm2+ Mounting Kit
- Regular+Offset Mounting Brackets
- Compatible with Intel LGA1700/1851/1954 sockets
- Compatible with AMD AM4/AM5 sockets
- Noise Performance
- 6-Year Warranty
Cons:
- Price
- Noctua could have used chromax.black fans



