Noctua NH-D15 G2, Dual Tower CPU Cooler, Standard vs Thermalright Peerless Assassin 120 SE V3 CPU Air
Updated August 2026 — Noctua NH-D15 G2, Dual Tower CPU Cooler, Standard wins on cooling perf and ease of install, Thermalright Peerless Assassin 120 SE V3 CPU Air wins on value for money.
The Noctua NH-D15 G2 offers superior performance and quieter operation, while the Thermalright Peerless Assassin 120 SE V3 provides excellent value for budget-conscious users.
Why Noctua NH-D15 G2, Dual Tower CPU Cooler, Standard is better
Cooling Performance
Noctua has 8 heat pipes vs Thermalright's 6.
Noise Levels
Noctua operates near silent at idle.
Installation
Noctua includes a dedicated screwdriver for easier setup.
Why Thermalright Peerless Assassin 120 SE V3 CPU Air is better
Price
Thermalright is significantly cheaper.
Size
Thermalright is more compact.
Aesthetics
Thermalright has a modern black finish.
Overall score
Specifications
| Spec | Noctua NH-D15 G2, Dual Tower CPU Cooler, Standard | Thermalright Peerless Assassin 120 SE V3 CPU Air |
|---|---|---|
| Max RPM | 1500 | 2000 |
| Noise Level | ≤24.6 dB(A) | ≤29.8 dB(A) |
| Compatibility | AM5, LGA1851 | AM4, AM5, LGA1851 |
| Fan Type | PWM | PWM |
| Thermal Paste | NT-H2 | Not included |
Dimension comparison
Price Comparison
The Noctua NH-D15 G2 is significantly more expensive than the Thermalright Peerless Assassin 120 SE V3, priced at $174.95 compared to only $35.90 for the Thermalright option. This places the Noctua cooler at a premium price point, approximately 387% higher than its competitor. While Noctua is known for its high-quality performance and quiet operation, the stark price difference raises questions about the value proposition for budget-conscious consumers. The Thermalright cooler, at less than a quarter of the price, may appeal to those looking for effective cooling solutions without the hefty investment.
Cooling Performance
The Noctua NH-D15 G2 boasts eight heat pipes and an impressive design that maximizes surface area, resulting in exceptional cooling performance. It features two NF-A14x25r G2 fans that provide optimal results for high-end CPUs like the Ryzen 9 9950X and Intel Core Ultra 285K. In contrast, the Thermalright Peerless Assassin 120 SE V3 also utilizes a dual-tower design and incorporates six heat pipes, coupled with dual 120mm PWM fans that can reach speeds up to 2000 RPM. While both coolers are engineered for performance, the Noctua model is specifically designed for maximum efficiency under load, which may benefit users with high-performance setups.
Noise Levels
The Noctua NH-D15 G2 is specifically designed for quiet operation, making it a favorite among users who prioritize low noise levels. Its dual fans operate with a speed-offset for acoustic fine-tuning, ensuring that the cooler remains near silent at idle. The Thermalright Peerless Assassin 120 SE V3, while also equipped with PWM fans, can produce operational noise levels of up to 29.8 dB(A) at maximum RPM. This difference in design philosophy may be crucial for gamers or professionals who require a silent environment, as the Noctua cooler emphasizes low noise without sacrificing performance.
Installation Process
Installation processes differ between the two coolers, with the Noctua NH-D15 G2 providing a Torx-based SecuFirm2+ mounting system, which is designed for ease of installation on various platforms, including AMD AM5 and Intel LGA1851. The Thermalright Peerless Assassin 120 SE V3 also offers a straightforward installation with included mounting accessories, but requires the original motherboard backplate for AMD installations. Users may find the Noctua's installation system more user-friendly, particularly for those who are new to building PCs, as it comes with a dedicated screwdriver and comprehensive instructions.
Compatibility
Compatibility is a strong point for both coolers, but the Noctua NH-D15 G2 has an edge when it comes to modern socket support. It is compatible with AMD AM5 and Intel LGA1851, as well as previous Intel sockets like LGA1200 and LGA115x. The Thermalright Peerless Assassin 120 SE V3 also supports a wide range of sockets, including AM4, AM5, and several Intel generations up to LGA1851. However, the specific mention of reduced CPU warp compatibility with the Noctua cooler highlights its engineering focus on maintaining CPU integrity during operation, which may be important for high-end builds.
Aesthetics and Design
Aesthetically, the Noctua NH-D15 G2 features the brand's signature brown and beige color scheme, which may not appeal to everyone but is highly regarded for its premium look. In comparison, the Thermalright Peerless Assassin 120 SE V3 sports a blackened anodic matte finish that may better suit modern build aesthetics and appeal to gamers looking for a sleek appearance. The design choice can be a deciding factor for users who care about visual integration within their builds, as both coolers offer distinct styles that cater to different tastes.
Overall Value
When assessing overall value, the Noctua NH-D15 G2 represents a high-end investment in cooling technology, justified by its superior performance and quiet operation. However, the Thermalright Peerless Assassin 120 SE V3 presents an excellent value for users who need effective cooling at a fraction of the cost. At only $35.90, it offers remarkable cooling performance, albeit with some compromises in noise levels and premium features. Users must weigh their budget against their performance needs to determine which cooler provides the best overall value for their specific situation.
Which should you buy?
Choosing between the Noctua NH-D15 G2 and the Thermalright Peerless Assassin 120 SE V3 ultimately comes down to your specific needs and budget. If you prioritize top-tier performance, quiet operation, and are willing to invest significantly more, the Noctua is the superior choice. However, if you seek a reliable cooler that offers solid performance at an affordable price, the Thermalright is an excellent option that delivers great value without breaking the bank. Your decision should align with your performance requirements, system compatibility, and budget constraints.

