Thermalright Peerless Assassin 120 Black CPU Air Cooler vs upHere H45K6 Low Profile CPU Cooler 45mm Height - 6 Heat Pipes
Updated August 2026 — The Thermalright Peerless Assassin 120 Black offers superior cooling performance and aesthetics, while the upHere H45K6 is a more budget-friendly and compact option. Choose based on your specific needs.
The Thermalright Peerless Assassin 120 Black offers superior cooling performance and aesthetics, while the upHere H45K6 is a more budget-friendly and compact option. Choose based on your specific needs.
Why Thermalright Peerless Assassin 120 Black CPU Air Cooler is better
Cooling Performance
Thermalright has higher airflow and dual fans.
Design
Sleek dual-tower design enhances aesthetics.
Heat Pipe Technology
Advanced AGHP technique improves thermal performance.
Why upHere H45K6 Low Profile CPU Cooler 45mm Height - 6 Heat Pipes is better
Price
upHere is more affordable at C$49.99.
Compact Size
Low-profile design fits in tight spaces.
Installation
Tool-free setup in under five minutes.
Overall score
Specifications
| Spec | Thermalright Peerless Assassin 120 Black CPU Air Cooler | upHere H45K6 Low Profile CPU Cooler 45mm Height - 6 Heat Pipes |
|---|---|---|
| Max Airflow | 66.17 CFM | 35.34 CFM |
| Noise Level | 25.6 dB(A) | 27 dB(A) |
| Socket Compatibility | Intel LGA1150/1700, AMD AM4/AM5 | Intel LGA1851/1700, AMD AM4/AM5 |
| Fan RPM | 1500 RPM | 800-2800 RPM |
| TDP Support | N/A | 150W |
Dimension comparison
Price Comparison
When it comes to pricing, the upHere H45K6 Low Profile CPU Cooler is slightly more affordable, retailing at C$49.99, compared to the Thermalright Peerless Assassin 120 Black CPU Air Cooler, which costs C$54.90. This C$4.91 difference might seem minor, but for budget-conscious consumers, it could influence their decision. Both price points reflect the performance capabilities of the coolers, but if you're looking for a more economical option, the upHere cooler offers a better value.
Cooling Performance
The Thermalright Peerless Assassin 120 Black boasts a superior cooling performance thanks to its dual tower design and two 120mm PWM fans. With a maximum airflow of 66.17 CFM and a noise level of just 25.6 dB(A), it is engineered to maintain excellent thermal efficiency. In contrast, the upHere H45K6, while more compact, still delivers a respectable airflow of 35.34 CFM through its 90mm fan. This makes the Thermalright cooler a better choice for high-performance CPUs or overclocking scenarios, while the upHere cooler is designed for space-saving builds without compromising too much on cooling efficiency.
Design and Dimensions
In terms of design, the upHere H45K6 is ultra-compact at just 45mm in height, making it ideal for Mini ITX cases. This low-profile design ensures it avoids obstruction with RAM and other components, allowing for versatile installation. Meanwhile, the Thermalright Peerless Assassin 120 Black measures 125mm in length, 135mm in width, and 157mm in height, which means it requires more space but can provide enhanced cooling capabilities due to its larger surface area and dual-fan setup. If space constraints are a major consideration, the upHere cooler wins, but for larger setups, the Thermalright offers better overall performance.
Fan Efficiency and Noise Levels
The Thermalright Peerless Assassin operates with two PWM fans that can reach a speed of 1500 RPM, providing a significant airflow while maintaining a noise level of 25.6 dB(A). This makes it an excellent option for users who prefer quieter operation without sacrificing cooling performance. Conversely, the upHere H45K6 features a single 90mm fan that operates between 800 and 2800 RPM, achieving a maximum noise level of 27 dB(A). While the noise levels are comparable, the dual fans of the Thermalright cooler allow for more effective heat dissipation, making it more suitable for demanding tasks.
Installation and Compatibility
Both coolers offer impressive compatibility with a range of CPU sockets. The Thermalright Peerless Assassin supports Intel sockets including LGA1150, LGA1151, and LGA1700, as well as AMD’s AM4 and AM5 sockets. The upHere H45K6 also offers wide compatibility, supporting Intel LGA 1851, 1700, and various 115x sockets alongside AMD’s AM4 and AM5. Installation for both units is straightforward, but the upHere cooler promises a tool-free setup that can be completed in under five minutes, making it a more convenient option for those who value quick installation processes.
Heat Pipe Technology
The Thermalright Peerless Assassin features six 6mm heat pipes designed with AGHP technique, which helps in overcoming gravitational effects in various orientations. This advanced design enhances thermal performance significantly, making it effective even in high-intensity scenarios. On the other hand, the upHere H45K6 also incorporates six heat pipes that ensure effective heat transfer, supporting a TDP of 150W. While both coolers utilize heat pipe technology, the Thermalright’s design may offer a slight edge in performance under heavy loads.
Aesthetics
Aesthetically, the Thermalright Peerless Assassin 120 Black showcases a sleek design with its black electroplated finish, making it a suitable addition to any modern build. The dual-tower design not only enhances cooling but also adds a robust look to the setup. The upHere H45K6, while compact, offers a more utilitarian appearance, prioritizing practicality over style. If visual appeal is a critical factor for your build, the Thermalright cooler is likely to be the more attractive choice.
Which should you buy?
Choosing between the Thermalright Peerless Assassin 120 Black and the upHere H45K6 ultimately depends on your specific needs. If you're looking for superior cooling performance, especially in larger builds or for overclocking, the Thermalright cooler is the better option, albeit at a slightly higher price of C$54.90. However, if you require a low-profile solution that fits in tight spaces and is budget-friendly at C$49.99, the upHere H45K6 is an excellent choice. Both coolers provide solid performance, but understanding your setup and requirements will guide you to the right decision.
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