Thermalright Peerless Assassin 120 CPU Air Cooler vs Noctua NH-D15 G2 LBC
Updated August 2026 — The Thermalright Peerless Assassin 120 offers excellent value for budget-conscious users, while the Noctua NH-D15 G2 LBC excels in premium performance and quiet operation.
The Thermalright Peerless Assassin 120 offers excellent value for budget-conscious users, while the Noctua NH-D15 G2 LBC excels in premium performance and quiet operation.
Why Thermalright Peerless Assassin 120 CPU Air Cooler is better
price
Thermalright is significantly cheaper at C$51.39
compatibility
Wider socket support for various builds
aesthetics
Modern design with ARGB lighting effects
Why Noctua NH-D15 G2 LBC is better
cooling performance
Superior cooling with 8 heat pipes and larger surface area
noise levels
Near-silent operation under load
build quality
High-quality materials and design
Overall score
Specifications
| Spec | Thermalright Peerless Assassin 120 CPU Air Cooler | Noctua NH-D15 G2 LBC |
|---|---|---|
| Price | C$51.39 | C$209.95 |
| Airflow | 66.17 CFM | N/A |
| Noise Level | 25.6 dB(A) | N/A |
| Heat Pipes | 6 | 8 |
| Fan Type | PWM | NF-A14x25r G2 |
Dimension comparison
Overview
When it comes to cooling performance in CPU coolers, the Thermalright Peerless Assassin 120 and the Noctua NH-D15 G2 LBC represent two distinct approaches. The Peerless Assassin 120 is priced at C$51.39, making it an attractive budget-friendly option, while the NH-D15 G2 LBC comes in at C$209.95, aimed at users seeking premium performance. This price difference sets the stage for a thorough comparison of features, performance, and overall value.
Cooling Performance
The Thermalright Peerless Assassin 120 claims an impressive heat dissipation area of 9600 cm², supported by its dual tower design and six 6mm heat pipes. This cooler is rated for a thermal design power (TDP) of 245W, indicating it can handle high-performance CPUs with ease. In contrast, the Noctua NH-D15 G2 LBC boasts 20% more surface area compared to its predecessor, with eight heat pipes, which enhances its cooling capabilities. Both coolers aim for quiet operation, but the NH-D15 G2 LBC is designed with a focus on noise reduction, utilizing two NF-A14x25r G2 fans that are adept at balancing cooling and quietness.
Fan Technology
Fan technology plays a crucial role in the performance of CPU coolers. The Thermalright Peerless Assassin 120 features two PWM fans with a maximum airflow of 66.17 CFM and a noise level of 25.6 dB(A), which is relatively quiet. Meanwhile, the Noctua NH-D15 G2 LBC includes two state-of-the-art NF-A14x25r G2 fans that provide optimal efficiency under load while remaining near silent at idle. This design allows for fine-tuning of fan speed and acoustic performance, making it a strong contender for users who prioritize a quiet computing environment.
Installation and Compatibility
The Thermalright Peerless Assassin 120 is designed with an offset asymmetric layout, allowing for unrestricted installation without obstructing memory chips. It supports a wide range of sockets, including Intel's LGA 1700 and AMD's AM4. In comparison, the Noctua NH-D15 G2 LBC features a specialized Low Base Convexity (LBC) version, optimised for flat CPUs such as AMD AM5, but it is not recommended for Intel’s LGA 1700 or LGA 1200 sockets without the appropriate kit. The Peerless Assassin offers broader compatibility, which may appeal to users with diverse builds.
Aesthetics and Build Quality
Aesthetics can significantly influence a buyer's choice of cooler. The Thermalright Peerless Assassin 120 sports a modern white paint finish with ARGB lighting effects, adding a vibrant touch to any build. The Noctua NH-D15 G2 LBC, while not as flashy, features a classic brown and beige colour scheme that has become iconic among enthusiasts, appealing to those who prefer a more understated look. Both coolers are built with quality materials, but the choice in aesthetics ultimately depends on personal preference.
Price to Performance Ratio
The Thermalright Peerless Assassin 120 offers a remarkable price-to-performance ratio at C$51.39, especially considering its robust cooling capabilities. On the other hand, the Noctua NH-D15 G2 LBC, while significantly more expensive at C$209.95, is aimed at users who require top-tier cooling performance and are willing to invest more for premium features. For budget-conscious users or those with mid-range builds, the Peerless Assassin provides excellent value without compromising on performance.
Noise Levels
Noise levels are an important consideration for many PC builders. The Thermalright Peerless Assassin 120 reaches a noise level of 25.6 dB(A) under normal operating conditions, which is relatively quiet for a cooler of its size. The Noctua NH-D15 G2 LBC, designed for near-silent operation, excels in this regard, with advanced fan technology that ensures quiet operation even under load. Users who value silence will likely find the NH-D15 G2 LBC to be superior in this aspect, although it comes at a higher price point.
Which should you buy?
Ultimately, the choice between the Thermalright Peerless Assassin 120 and the Noctua NH-D15 G2 LBC hinges on your specific needs and budget. If you are looking for an affordable cooler that offers solid performance, the Peerless Assassin 120 at C$51.39 is a commendable choice. However, if you demand the best in cooling performance and are prepared to invest C$209.95, the Noctua NH-D15 G2 LBC provides exceptional efficiency and low noise levels. Your decision should reflect whether you prioritise cost-effectiveness or premium cooling capabilities.
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