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Noctua NH-D15 vs Thermalright Peerless Assassin 120 Black CPU Air Cooler

Updated August 2026The Noctua NH-D15 offers superior cooling performance and build quality, while the Thermalright Peerless Assassin 120 Black is a budget-friendly option. Choose based on your cooling needs and budget.

The Noctua NH-D15 offers superior cooling performance and build quality, while the Thermalright Peerless Assassin 120 Black is a budget-friendly option. Choose based on your cooling needs and budget.

Why Noctua NH-D15 is better

Cooling Performance

Noctua NH-D15 is renowned for its exceptional cooling capabilities.

Build Quality

Noctua NH-D15 has received over 250 awards for its design and quality.

Noise Levels

Noctua NH-D15 operates more quietly under load.

Why Thermalright Peerless Assassin 120 Black CPU Air Cooler is better

Price

Thermalright Peerless Assassin 120 Black is significantly cheaper.

Compact Size

Thermalright cooler fits better in tighter spaces.

Installation

Thermalright cooler is easier to install due to its smaller form factor.

Overall score

Noctua NH-D15
90
Thermalright Peerless Assassin 120 Black CPU Air Cooler
70

Specifications

SpecNoctua NH-D15Thermalright Peerless Assassin 120 Black CPU Air Cooler
PriceC$149.95C$54.90
Fan TechnologyNF-A15 140mmTL-C12B 120mm
Noise Level≤24.6 dB(A)≤25.6 dB(A)
Thermal PasteIncludedNot mentioned
Socket CompatibilityLGA1700, AM5LGA1700, AM5

Dimension comparison

Noctua NH-D15Thermalright Peerless Assassin 120 Black CPU Air Cooler

Price Comparison

When it comes to price, the Noctua NH-D15 is significantly more expensive than the Thermalright Peerless Assassin 120 Black, retailing at C$149.95 compared to C$54.90. This represents a difference of C$95.05, making the Thermalright cooler a more budget-friendly option for users looking to enhance their CPU cooling without breaking the bank. While the Noctua NH-D15 offers premium features and performance, the Thermalright model provides a compelling value proposition for those who may not need the highest-end cooling solutions.

Design and Build Quality

The Noctua NH-D15 features a state-of-the-art dual-tower design equipped with six heatpipes and two fans, which contribute to its class-leading cooling performance. Its design is not only functional but also aesthetically appealing, having received over 250 awards and recommendations from hardware enthusiasts and experts. In comparison, the Thermalright Peerless Assassin 120 Black also sports a double tower design but is primarily noted for its effective heat dissipation area of 9600cm. The electroplating reflow welding process with a sleek black spray finish adds to its visual appeal, but it may not have the same level of recognition as the Noctua.

Cooling Performance

The cooling performance of the Noctua NH-D15 is renowned, making it a top choice for overclocking and near-silent systems. It utilises two highly optimised 140mm NF-A15 fans that provide excellent airflow and low noise levels, ensuring effective cooling even under heavy loads. The Thermalright Peerless Assassin 120 Black, while also designed for strong cooling capabilities with its dual fans, has a maximum airflow of 66.17 CFM and a noise level of 25.6 dB(A). Although the Thermalright cooler offers solid performance, it may not match the high-end efficiency of the Noctua under extreme conditions.

Fan Technology

The Noctua NH-D15 comes with two NF-A15 140mm fans that feature PWM support and Low-Noise Adaptors, allowing for automatic speed control and ultra-quiet operation. This advanced fan technology contributes to its reputation for silence and performance. Conversely, the Thermalright Peerless Assassin 120 Black includes two 120mm PWM fans with a maximum speed of 1500 RPM. While both coolers utilise PWM technology for efficient speed control, the larger fans on the Noctua could provide better airflow and quieter operation overall.

Installation and Compatibility

Installation ease is an important factor for many users, and the Noctua NH-D15 excels in this area with its SecuFirm2 mounting system, which supports a wide range of Intel and AMD sockets, including the latest LGA1700 and AM5. The NH-D15 is designed for hassle-free installation, even for those new to building PCs. The Thermalright Peerless Assassin 120 Black also offers a variety of compatibility options for Intel and AMD platforms, but its slightly smaller form factor may make it easier to fit in tighter spaces. Both products come with the necessary mounting hardware, but the Noctua's reputation for quality installation sets it apart.

Thermal Paste Inclusion

The Noctua NH-D15 includes high-end NT-H1 thermal paste, ensuring optimal thermal conductivity between the CPU and the cooler. This addition can significantly enhance cooling performance right out of the box. On the other hand, the Thermalright Peerless Assassin 120 Black does not mention the inclusion of thermal paste, which could necessitate an additional purchase for optimal performance. This difference can be crucial for users looking to set up their systems quickly and effectively.

Noise Levels

Noise levels are a significant consideration for users aiming for a quiet computing environment. The Noctua NH-D15 is celebrated for its near-silent operation thanks to its well-designed fans and low-noise adaptors. In contrast, the Thermalright Peerless Assassin 120 Black boasts a maximum noise level of 25.6 dB(A), which is relatively quiet but may still produce more sound than the Noctua under load. For audiophiles or those working in noise-sensitive environments, the quieter operation of the NH-D15 could be a deciding factor.

Which should you buy?

Choosing between the Noctua NH-D15 and the Thermalright Peerless Assassin 120 Black ultimately depends on your specific needs and budget. If you are looking for premium cooling performance, exceptional build quality, and quieter operation, the Noctua NH-D15 is worth the investment at C$149.95. However, if you are on a tighter budget and still want a capable cooling solution, the Thermalright Peerless Assassin 120 Black at C$54.90 offers excellent value and solid performance for most users.

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Noctua NH-D15 vs Thermalright Peerless Assassin 120 Black CPU Air Cooler | versusfinder