Noctua has spent years proving that PC cooling doesn’t need to be loud or flamboyant to be excellent, and the NL-LC1 is its first serious attempt to translate that cultivated formula into an all-in-one (AIO) liquid cooler. Rather than chasing gimmicks, Noctua is aiming for low noise, strong thermals, and the kind of refinement that has defined the company’s best products for over a decade.
But if you know Noctua, you’ll understand that progress comes slowly. The Austrian firm’s engineers are hard at work developing a revolutionary thermosiphon cooler that does away with the need for a pump, and though progress is clear to see, a retail release is at least a year or two away. Instead, what we have now is a stopgap, dubbed the NL-LC1 and developed in partnership with Asetek, the most experienced name in AIOs. Asetek x Noctua has a ring to it, so let’s take a closer look.
Noctua NL-LC1
€249.90
Pros
- Outstanding cooling
- Exceptionally quiet, especially at low/mid fan speeds
- Wide socket support and excellent mounting
- Includes NT-H2 paste, AM5 paste guard and Torx screwdriver
- Six-year warranty
Cons
- Radiator thicker than usual (30mm vs typical 27); case clearance must be checked
- Higher price than most coolers
- No chromax.black variant (yet)
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The NL-LC1 arrives in 240mm, 360mm, and 420mm versions, with European pricing set at €219.90, €249.90, and €279.90, respectively. That places it firmly in premium territory, but did you expect any different? Noctua has routinely aimed for the top-end of the market, targeting buyers who are willing to spend extra for the promise of tighter engineering, acoustic excellence, and a six-year warranty from a reputable brand.
To that end, Noctua builds the NL-LC1 around Asetek’s Emma V2 platform and pairs it with a three-layer pump sound absorber designed to reduce vibration and transmitted noise. The cooler ships with 240mm and 360mm variants using NF-A12x25 G2 fans, while the 420mm model steps up to NF-A14x25 G2 fans.
The pump offers three profiles: quiet, balanced, and manual, with the last giving full RPM control to enthusiasts. Attention to the little details is a recurring theme throughout the NL-LC1, as evidenced by Noctua using speed offsetting on the fans to avoid beat-frequency hum. This may be yet another Asetek cooler, but it clearly carries extra polish where it counts.
Specification
| Noctua NL-LC1 | Details |
| Socket support | Intel LGA1851, LGA1700; AMD AM4, AM5 |
| Radiator dimensions | 400 x 120 x 30mm |
| Fan size and type | 3× NF-A12x25 G2 (120 x 120 x 25mm) |
| Fan speed range | 0-1,800rpm |
| Fan airflow | 63.15CFM |
| Fan static pressure | 3.14mm H2O |
| Pump Speed Range | 750-3,400rpm |
| Tubing Length | 410mm |
| Warranty | 6 years |
| Price | €249.90 |
Unboxing
True to Noctua tradition, Noctua NL-LC1 arrives in a sturdy, information-rich box that immediately positions it as a flagship piece of hardware, and of course, it’s brown in colour.
Inside, thick cardboard inserts separate and secure the heatsink, fans, and accessory packs, ensuring the AIO cooler is well protected in transit. Alongside the black heatsink and three NF-A12x25 G2 fans, you’ll find separate labelled bags for Intel and AMD mounting hardware. This helps avoid confusion during setup.
Noctua includes its excellent NT-H2 thermal paste, an NA-TPG1 thermal paste guard for AM5 sockets, and an NA-CW1 cleaning wipe.
The full list of contents is as follows:
- Noctua metal case badge
- Metal Noctua logo faceplate
- 3x NF-A12x25 G2 PWM fans with speed-offset (PPA/PPB/PPA)
- 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
This comprehensive bundle underscores that the cooler is designed for enthusiasts who expect a frictionless, premium experience from unboxing to final installation.
The overall presentation strikes a balance between a premium feel and practical organisation. Every component has its own place, and the documentation clearly walks through the platform specifics. It’s the sort of unboxing experience that reinforces this cooler’s high-end price tag while quietly hinting that nothing important has been overlooked.
Design
The NL-LC1 is unmistakably a Noctua product, even if the format has changed from air to liquid. One upgrade that’s immediately apparent is a radiator measuring 30mm thick. A few millimetres chunkier than common 27mm solutions gives Noctua extra surface area for heat dissipation, yet installation remains a breeze thanks to tried-and-trusted SecuFirm2+ mounting mechanism. The company has clearly tried to make the jump to liquid cooling feel like a continuation of its existing philosophy rather than a departure from it.
Despite the comprehensive bundle, one component is conspicuous in its absence. We’ve previously seen Noctua demo the NL-LC1 with an extra fan atop the pump assembly. It turns out this will be an optional accessory, dubbed the NL-ACF1 auxiliary cooling fan. Snapping magnetically to the top of any NL-LC1 series cooler, this add-on employs an NF-A8 80mm PWM fan to aid nearby VRMs, memory modules, and M.2 SSDs that can benefit from a little extra airflow. It’s a neat addition, but at this price, it’s one we’d like to have seen included in the box.
Back to the 360mm NL-LC1-36 cooler at hand, Noctua officially specifies an in-house NSPR (Noctua Standardised Performance Rating) of 248, compared to 210 for the 240mm variant and 268 for the flagship 420mm. To put these numbers into perspective, the award-winning NH-D15 G2 air cooler has an NSPR rating of 228, meaning Noctua expects its 360mm AIO to deliver a performance advantage in the region of 9%. Helping achieve that target are next-generation NF-A12x25 G2 fans, tuned specifically for heatsinks with a focus on high static pressure and smooth acoustics rather than raw rotational speed.
Fan speed ranges from 0 to 1,800rpm with full PWM control, and it’s good to see Noctua continuing to support 0dB operation. This allows the fans to stop entirely at low load when configured appropriately in the BIOS.
The bundled NF-A12x25 G2 PWM fans, in signature brown-and-beige colourways – use a 120mm frame and a finely tuned blade profile derived from Noctua’s A-series tech, designed to maintain pressure even through dense fin stacks.
An excellent motor and refined bearing allows them to ramp smoothly and avoid sudden tonal spikes during load changes. At the top end, they become clearly audible, but the sound’s character remains more of a well-behaved airflow rush than an intrusive mechanical whine. At maximum speed, these fans are rated for 63.15CFM and an acoustic profile of just 22.5dBA. In practice, it translates to a powerful yet carefully controlled whoosh rather than harsh noise.
Anti-vibration pads at the corners and robust frames help keep resonance in check. At the same time, the 4-pin PWM connector and supplied splitter make it easy to sync fan behaviour from a single motherboard header. Given their rated performance and acoustics, these fans are a key reason the Noctua NL-LC1 competes credibly with other large AIOs. The caveat? There’s no chromax.black variant as yet, and if past history is anything to go by, those favouring a blacked-out model could be waiting a while.
Installation
SecuFirm2+ is the latest iteration of Noctua’s renowned mounting system, and it continues to impress with a blend of rigidity and ease of use on the on the NL-LC1.
AMD AM4 and AM5 users rely on the native backplate, which includes platform-specific bars and spacers.
Intel users with LGA1851 or LGA1700 sockets receive a dedicated metal backplate and brackets.
The Torx-based screws and included T20 screwdriver ensure secure, repeatable mounting pressure without the risk of stripping heads, which is particularly welcome when working inside cramped cases. The 30mm-thick radiator does, however, require a clearance check in advance to fit in most chassis; it shouldn’t be an issue, but check once, check twice, and then make it fit.
In practice, the installation process is methodical rather than difficult: you first mount the backplate and brackets, then secure the heatsink using the crossbar, and finally clip the fans into place and connect them via the PWM splitter. Those familiar with earlier Noctua (air) coolers will find the process very familiar, and the entire setup – from unboxing through to bundled accessories – exudes a layer of polish befitting the cooler’s flagship status.
The tubes, radiator format, and fan choices suggest a product that is meant to be installed once and then left alone for years. That lines up nicely with the company’s usual approach, where long-term reliability and practical servicing matter as much as peak performance figures.
Performance
I’m running benchmarks on both AMD and Intel platforms to help provide a glimpse of real-world results irrespective of which CPU brand you prefer. Full specifications for both test systems are available below.
| AMD system | Intel system | |
|---|---|---|
| CPU | AMD Ryzen 9 9950X3D | Intel Core i9-13900K |
| Motherboard | Asus Crosshair X870E Hero | Asus ROG Strix Z690-E Gaming WiFi |
| RAM | 2×16GB G.Skill Trident Z5 Neo | 2×16GB Geil Gemini RGB TUF |
| Memory speed | 6,000MT/s CL28 | 6,000MT/s CL34 |
| GPU | Asus TUF Gaming GeForce RTX 3080 | Asus TUF Gaming GeForce RTX 3080 |
| Chassis | Thermaltake View 380 XL TG ARGB | Thermaltake View 380 XL TG ARGB |
| PSU | Endorfy Supremo FM6 1000W | Endorfy Supremo FM6 1000W |
Performance tests were conducted using Cinebench 2024 (MT) at three stages of noise output – 36dBA, 39dBA, 42dBA – as well as three RPM settings: 800, 1,200 and max.
My cooling system noise tests are conducted under standardised conditions in an air-conditioned room (22°C), ensuring high repeatability of results. Measurements were taken at a distance of 30 centimetres from the computer case, while the background noise did not exceed 30 dB(A). Sound pressure was measured using a Voltcraft SL-100 decibel meter.
AMD thermals
Pushed into quiet mode, the Noctua NL-LC1 is better than all of the competition. A great start.
You’d expect the temperature to decrease as noise (and fan speed) are increased. It is exactly what we see, though the differences between 36dBA and 39dBA are not striking. Still, it’s worth noting that at this setting, Noctua’s first attempt at an AIO still leads the pack.
Pushing noise up to the highest I like to see – 42dBA – the test cooler still runs the best out of the bunch. A most impressive debut.
Intel thermals
13900K certainly runs hotter than 9950X3D. When forcing noise levels down to a minimum, it’s difficult to keep temperatures on the right side of 90°C, irrespective of air or liquid cooling.
On a hot-running chip, the results are about as good as it gets for 360mm AIO cooling.
Cranking fan speed up allows the liquid coolers to take a healthier lead, with the Noctua NL-LC1 maintaining nearly a 5% advantage over its nearest 360mm competitor.
Noise
I can also turn my testing around to determine noise levels at a particular RPM. Looking at fan performance in more detail reveals Noctua’s blowers to be a cut above most others.
A couple of first-place finishes show that the supplied fans are the quietest I’ve tested, and by a decent margin. While the noise readings are impressive, it’s also worth pointing out that the overall experience is calmer; Noctua’s smooth fan ramp-up is among the best in the business.
Overall, there’s no denying the Noctua NL-LC1 strikes a sweet spot between comfortable noise levels and actual CPU temperature. It is exactly what we had in mind for a Noctua AIO.
Conclusion
The NL-LC1 is a confident first step into a category Noctua has avoided for years, and it looks and feels far more like a Noctua cooler than a generic AIO with a different badge.
It is expensive, deliberate, and highly engineered, but that is exactly what the brand’s followers expect from Noctua’s debut liquid cooler. The Austrian firm can bamboozle the best of us with on-paper specifications and lab results, but the proof is in the pudding, and real-world acoustic tuning and thermal performance is as good as it gets. In one fell swoop, the NL-LC1 has become a preferred premium AIO for buyers who value silence as much as cooling power.
There are a couple of inevitable inconveniences. Pricing is on the high side for an Asetek-based cooler, and a brown-and-beige colour scheme remains an acquired taste. If neither of these serve as a hurdle, or you’re a Noctua fan at heart, the NL-LC1 delivers a heady mix mix of low noise, strong sustained performance, and the sort of polish that makes installation and day-to-day use uneventful.
What stands out to me is how well the concept translated from paper to reality. Three available radiator sizes cover the mainstream and enthusiast bases, the pump has well-thought-out operating modes, the SecuFirm2+ mounting system is every bit as good as we remember, and the fans are best-in-class. Far from a me-too addition to the Noctua range, the NL-LC1 is a well-judged product and the time spent on development has evidently paid off.
