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be quiet! Dark Rock Pro 5 Quiet Cooling CPU Cooler vs Thermalrlght Peerless Assassin 120 SE CPU Air

Updated August 2026 — be quiet! Dark Rock Pro 5 Quiet Cooling CPU Cooler leads on performance and cooling.

The be quiet! Dark Rock Pro 5 excels in performance and noise reduction, while the Thermalrlght Peerless Assassin 120 SE offers great value for budget-conscious users.

Why be quiet! Dark Rock Pro 5 Quiet Cooling CPU Cooler is better

Cooling Performance

Dark Rock Pro 5 has 7 heat pipes versus 6 in Peerless Assassin.

Noise Levels

Dark Rock Pro 5 features advanced noise reduction technology.

Design

Dark Rock Pro 5 has a premium aesthetic with a unique black coating.

Why Thermalrlght Peerless Assassin 120 SE CPU Air is better

Price

Peerless Assassin 120 SE is significantly cheaper.

Installation

Peerless Assassin 120 SE has a straightforward installation system.

Compatibility

Peerless Assassin supports a wide range of sockets.

Overall score

be quiet! Dark Rock Pro 5 Quiet Cooling CPU Cooler
88
Thermalrlght Peerless Assassin 120 SE CPU Air
72

Specifications

Specbe quiet! Dark Rock Pro 5 Quiet Cooling CPU CoolerThermalrlght Peerless Assassin 120 SE CPU Air
Max RPM20001550
Noise Level<25 dB(A)≤25.6 dB(A)
MaterialCopper/AluminumCopper/Aluminum
Fan TypePWMPWM
Socket SupportIntel/AMDIntel/AMD

Dimension comparison

be quiet! Dark Rock Pro 5 Quiet Cooling CPU CoolerThermalrlght Peerless Assassin 120 SE CPU Air

Introduction to CPU Coolers

When it comes to keeping your CPU temperatures in check, the choice of cooler can make a significant difference. In this comparison, we look at two notable CPU coolers: the be quiet! Dark Rock Pro 5 and the Thermalrlght Peerless Assassin 120 SE. The Dark Rock Pro 5 is priced at $84.90, whereas the Peerless Assassin 120 SE is more budget-friendly at $32.90, making it about 61% cheaper. Despite the price difference, each cooler has unique features that cater to different types of users.

Cooling Performance

The be quiet! Dark Rock Pro 5 is designed for high-performance cooling, featuring seven high-performance copper heat pipes that effectively dissipate heat even under peak performance. It can handle overclocked systems with ease. In contrast, the Thermalrlght Peerless Assassin 120 SE comes with six heat pipes and dual 120mm fans that provide solid cooling performance. While the Dark Rock Pro 5 is aimed at enthusiasts and gamers who may push their systems to the limit, the Peerless Assassin 120 SE offers adequate cooling for moderate users at a significantly lower price.

Noise Levels

Noise levels are crucial for many users, especially those who value a quiet computing environment. The Dark Rock Pro 5 boasts advanced Silent Wings PWM fans designed to minimize noise, with a maximum fan speed of 2000 RPM in Performance Mode. The decoupled fan mounting reduces turbulence, ensuring a quieter operation. Meanwhile, the Peerless Assassin 120 SE features two high-performance fans with a rated noise level of up to 25.6 dB(A). While both coolers are relatively quiet, the Dark Rock Pro 5 may have the edge in noise reduction due to its specialized design.

Design and Aesthetics

Aesthetics can play a significant role in the selection of a CPU cooler. The be quiet! Dark Rock Pro 5 is known for its sleek and iconic design, featuring a special black coating with ceramic particles. Its distinctive look has made it a popular choice among PC builders who prefer a premium appearance. On the other hand, the Thermalrlght Peerless Assassin 120 SE sports an anodized brushed black top cover and a more utilitarian design. While it may not have the same premium feel, the Peerless Assassin still offers a visually appealing option that can fit well in various builds.

Installation Process

Installation can often be a tedious task, but both coolers have features that aim to simplify this process. The Dark Rock Pro 5 boasts a clever design with a detachable mesh top cover that allows for easy installation of the fans and heatsink. It comes with a black mounting kit that matches its aesthetic. Conversely, the Peerless Assassin 120 SE is equipped with an SS2 installation system and includes a metal pressure plate to ensure better contact with the CPU. Both coolers offer straightforward installation experiences, but the Dark Rock Pro 5 may be slightly easier due to its design features.

Compatibility

Compatibility is an essential consideration when selecting a CPU cooler. The be quiet! Dark Rock Pro 5 is compatible with a wide range of sockets, including Intel and AMD. It is suitable for users who may upgrade their hardware in the future. The Thermalrlght Peerless Assassin 120 SE also has broad compatibility, supporting Intel LGA 1700 and AMD AM4/AM5 sockets. However, it requires the use of the original motherboard's built-in backplate for installation on AM4 and AM5 systems. Both coolers are designed to accommodate various setups, but users should ensure compatibility with their specific configurations.

Price Comparison

The price difference between the two coolers is significant. The be quiet! Dark Rock Pro 5 is priced at $84.90, while the Thermalrlght Peerless Assassin 120 SE is available for just $32.90. This makes the Dark Rock Pro 5 approximately 61% more expensive than its competitor. Users looking for a high-performance option with premium features may find the investment worthwhile, while those on a budget or with less demanding cooling needs might prefer the Peerless Assassin for its value.

Which should you buy?

Ultimately, the choice between the be quiet! Dark Rock Pro 5 and the Thermalrlght Peerless Assassin 120 SE depends on your specific needs and budget. If you are an enthusiast seeking top-tier cooling performance and are willing to invest in a premium option, the Dark Rock Pro 5 is an excellent choice. However, if you are looking for a reliable cooler that offers solid performance at a significantly lower price, the Peerless Assassin 120 SE is hard to beat. Each cooler has its strengths, making it essential to consider your individual requirements before making a decision.