vsversusfinder

be quiet! Dark Rock Pro 5 Quiet Cooling CPU Cooler vs Thermalright Assassin X 120R Digital ARGB Black

Updated August 2026 — be quiet! Dark Rock Pro 5 Quiet Cooling CPU Cooler leads on fan technology and build quality.

The be quiet! Dark Rock Pro 5 offers superior cooling performance and quieter operation, while the Thermalright Assassin X 120R is a budget-friendly option for moderate needs.

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

Cooling Performance

Dark Rock Pro 5 excels with dual fans and high RPM.

Noise Levels

Operates quieter under load compared to Assassin X.

Build Quality

Premium design with high-performance materials.

Why Thermalright Assassin X 120R Digital ARGB Black is better

Price

Assassin X is significantly cheaper.

Compatibility

Compatible with a wider range of sockets.

Aesthetics

ARGB lighting offers vibrant visual effects.

Overall score

be quiet! Dark Rock Pro 5 Quiet Cooling CPU Cooler
88
Thermalright Assassin X 120R Digital ARGB Black
72

Specifications

Specbe quiet! Dark Rock Pro 5 Quiet Cooling CPU CoolerThermalright Assassin X 120R Digital ARGB Black
Max RPM20002000
Fan TypePWMPWM
ModesQuiet/PerformanceAutomatic
MaterialCopper/AluminumPBT+PC
InstallationEasyModerate

Dimension comparison

be quiet! Dark Rock Pro 5 Quiet Cooling CPU CoolerThermalright Assassin X 120R Digital ARGB Black

Overview of the CPU Coolers

In this comparison, we will analyze two notable CPU coolers: the be quiet! Dark Rock Pro 5 and the Thermalright Assassin X 120R. The Dark Rock Pro 5 is priced at $84.90, while the Assassin X 120R is significantly more budget-friendly at $22.90, making it about 73% cheaper. Both coolers have their unique features aimed at providing effective cooling solutions for CPUs, but their design philosophies and performance capabilities cater to different user needs.

Design and Build Quality

The be quiet! Dark Rock Pro 5 boasts a premium design characterized by its distinctive black finish and high-quality materials. It incorporates seven high-performance copper heat pipes that enhance heat dissipation efficiency, making it suitable for overclocked systems. The cooler's dimensions are 145 x 136 x 168 mm, fitting elegantly into most cases.

In contrast, the Thermalright Assassin X 120R features a more straightforward design but also emphasizes functionality. Its overall height is 151 mm, which is compatible with most cases while still providing effective cooling. The digital screen top cover enhances its aesthetic appeal, merging performance with style. While both coolers reflect solid engineering, the Dark Rock Pro 5 clearly stands out in terms of aesthetics and high-end design features.

Cooling Performance

When it comes to cooling performance, the Dark Rock Pro 5 excels with its dual Silent Wings PWM fans that can reach speeds of up to 2000 RPM. This cooler is designed to maintain low temperatures even under peak CPU performance, making it ideal for gamers and overclockers. The ability to switch between Quiet and Performance Modes allows users to manage noise levels effectively.

On the other hand, the Thermalright Assassin X 120R also features a PWM fan capable of reaching 2000 RPM but focuses on automatic speed adjustments based on motherboard temperature. While it may not offer the same extensive cooling capabilities as the Dark Rock Pro 5, its performance remains commendable for standard applications and moderate gaming. Users seeking maximum cooling efficiency might prefer the Dark Rock Pro 5, while those with lighter needs may find the Assassin X sufficient.

Noise Levels

Noise levels are a significant consideration for many PC builders, and here, the Dark Rock Pro 5 shines. With its decoupled fan mounting and vibration-isolating elements, this cooler operates quietly, even under load. The maximum fan speed in Quiet Mode is capped at 1500 RPM, ensuring a serene computing experience.

The Thermalright Assassin X 120R, while designed to minimize noise with silicone corner pads, may not reach the same level of quiet operation. Although it employs a PWM function to adjust speeds as needed, users may still experience higher noise levels compared to the Dark Rock Pro 5 during peak operations. Thus, for users prioritizing a silent environment, the Dark Rock Pro 5 is the better choice.

Installation Process

Both coolers are designed for ease of installation, but they differ in their approaches. The Dark Rock Pro 5 features a clever installation design with a detachable mesh top cover that allows for straightforward access and setup. Its pre-installed mounting bridge simplifies the process, which is a significant plus for users who want a hassle-free experience.

The Thermalright Assassin X 120R also prioritizes user-friendliness with its overall compatible height and clear installation instructions. However, the lack of advanced design elements may make the Dark Rock Pro 5 more appealing to those who value ease of setup alongside aesthetic considerations.

Compatibility

Compatibility is crucial when selecting a CPU cooler, and both coolers cater to a wide range of systems. The Dark Rock Pro 5 is designed to handle high-performance CPUs and is suitable for users looking to overclock. Its dimensions and build quality allow it to fit into most ATX cases comfortably.

The Thermalright Assassin X 120R is compatible with a variety of sockets, including AM4/AM5 and Intel LGA1700/1851/1150/1151/1200. Its slightly taller design may not fit in as many cases as the Dark Rock Pro 5, but it still serves a broad audience looking for an efficient cooling solution. Overall, both coolers are versatile, with the Dark Rock Pro 5 catering slightly more to high-performance needs.

Aesthetics and RGB Features

The visual appeal of a CPU cooler can enhance the overall look of a gaming rig, and both coolers offer unique features. The Dark Rock Pro 5 maintains a sleek, professional appearance with its black coating and iconic design, making it a favorite among those who appreciate understated elegance.

Conversely, the Thermalright Assassin X 120R incorporates ARGB lighting that syncs with the motherboard's 5V 3-pin connection, providing vibrant visual effects. This could be particularly appealing for users wanting to create a visually striking build. While the Assassin X offers a more colorful and modern aesthetic, the Dark Rock Pro 5 holds its ground with refined sophistication.

Which should you buy?

Choosing between the be quiet! Dark Rock Pro 5 and the Thermalright Assassin X 120R ultimately depends on your specific needs and budget. The Dark Rock Pro 5, priced at $84.90, is the superior option for those seeking maximum cooling performance, quieter operation, and premium aesthetics. However, if budget constraints are a priority, the Thermalright Assassin X 120R offers solid performance at just $22.90, making it an excellent choice for users with moderate cooling needs. Consider your priorities—be it performance, noise levels, or aesthetics—before making your final decision.