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Cooler Master i70C ARGB Low Profile CPU Air Cooler vs Thermalright Assassin X 120R SE V2 CPU Cooler, 4×

Updated August 2026 — Cooler Master i70C ARGB Low Profile CPU Air Cooler leads on aesthetics and cooling efficien.

The Cooler Master i70C ARGB excels in compact design and aesthetics, while the Thermalright Assassin X 120R SE V2 offers broader compatibility and robust cooling performance.

Why Cooler Master i70C ARGB Low Profile CPU Air Cooler is better

Design

Minimalist and compact for low-profile builds

Cooling

Optimized for moderate TDP CPUs with adjustable fan speeds

Installation

Simplified bracket design for easy setup

Why Thermalright Assassin X 120R SE V2 CPU Cooler, 4× is better

Compatibility

Supports more CPU sockets including AMD

Cooling Performance

Higher performance with four heat pipes

Noise Level

Maintains low noise at full speed

Overall score

Cooler Master i70C ARGB Low Profile CPU Air Cooler
85
Thermalright Assassin X 120R SE V2 CPU Cooler, 4×
78

Specifications

SpecCooler Master i70C ARGB Low Profile CPU Air CoolerThermalright Assassin X 120R SE V2 CPU Cooler, 4×
Fan Speed650-1800 RPM1550 RPM
ARGB LightingYesYes
Socket SupportLGA 1700/1851LGA 1150/1151/1200/1700/AM4/AM5
MaterialAluminum/CopperAluminum/Copper
Noise Level≤25 dB(A)≤25.6 dB(A)

Dimension comparison

Cooler Master i70C ARGB Low Profile CPU Air CoolerThermalright Assassin X 120R SE V2 CPU Cooler, 4×

Overview of Cooler Master i70C ARGB and Thermalright Assassin X 120R SE V2

The Cooler Master i70C ARGB is priced at $19.49, while the Thermalright Assassin X 120R SE V2 is available for about $16.59, making it roughly 17% cheaper. Both coolers cater to different user needs and preferences, showcasing their unique features and design philosophies. This comparison will delve into essential aspects, including design, cooling performance, compatibility, noise levels, and overall value.

Design and Aesthetics

The Cooler Master i70C ARGB boasts a minimalist yet elegant design with anodized black aluminum fins that enhance its visual appeal while ensuring efficient cooling. Its compact size, standing at 70mm tall, is particularly advantageous for low-profile chassis, making it suitable for small form factor builds. On the other hand, the Thermalright Assassin X 120R SE V2 features a larger design with a height of 148mm, accommodating a more robust cooling system. This height allows for greater compatibility with various cases, but it may not fit well in tighter spaces. Both coolers feature ARGB lighting, though the i70C emphasizes a vibrant and customizable luminous effect with its frosted blade design.

Cooling Performance

In terms of cooling performance, the Cooler Master i70C ARGB is designed for CPUs with a thermal design power (TDP) of up to 95W. It utilizes a copper insert base for efficient heat dissipation and includes a 120mm PWM fan that operates between 650 to 1,800 RPM. This range allows for a balance between cooling performance and noise levels. Conversely, the Thermalright Assassin X 120R SE V2 incorporates a more complex setup with four 6mm heat pipes and a fan speed of 1550 RPM. While the i70C is optimized for lower TDP CPUs, the Assassin X is better suited for higher-performance systems, making it a more versatile option for users with varying needs.

Compatibility

When it comes to compatibility, the Cooler Master i70C ARGB is specifically designed for Intel LGA 1700 and 1851 sockets, ensuring a seamless fit for these platforms. Its simplified bracket design facilitates easy installation, particularly in compact builds. The Thermalright Assassin X 120R SE V2, however, offers broader compatibility, supporting Intel sockets such as LGA 1150, 1151, and 1200, as well as AMD AM4 and AM5 platforms. This versatility makes the Assassin X a more flexible choice for users who may switch between different CPU platforms in the future.

Noise Levels

Noise levels are a crucial consideration for any CPU cooler. The Cooler Master i70C operates quietly, especially at lower RPMs, which can drop to 650. This feature is essential for users who prioritize a silent computing experience. The Thermalright Assassin X 120R SE V2 also emphasizes low noise, with a maximum noise level of 25.6 dB(A) at full speed. While both coolers provide quiet operation, the i70C's PWM fan allows for more significant adjustments, potentially leading to quieter performance in less demanding scenarios.

Installation Process

Installation can often be a daunting task for many PC builders. The Cooler Master i70C ARGB stands out with its redesigned brackets, simplifying the installation process for Intel LGA 1700 and 1851 platforms. This ease of installation is particularly beneficial for users who may not have extensive experience with PC assembly. In contrast, the Thermalright Assassin X 120R SE V2 includes metal fasteners for both Intel and AMD platforms, along with installation instructions. Although it aims to provide a straightforward setup, the increased height and complexity could make it slightly more challenging for novice builders compared to the i70C.

Long-term Reliability

Long-term reliability is an essential factor in choosing a CPU cooler. The Cooler Master i70C ARGB features durable materials, including a copper core for efficient heat dissipation, aimed at ensuring longevity. Its PWM fan also boasts a long life expectancy. Meanwhile, the Thermalright Assassin X 120R SE V2 uses S-FDB bearings, designed to minimize fan blade shaking and noise, thereby extending the fan's operational life. Both coolers are built to last, but the specific choice may depend on the user’s system requirements and preferences for long-term reliability.

Overall Value

In terms of overall value, the Cooler Master i70C ARGB is priced at $19.49, while the Thermalright Assassin X 120R SE V2 is available for $16.59. Despite the Assassin X being cheaper by about $2.90, the i70C offers a compelling combination of aesthetics, compact design, and efficient cooling, particularly for low-profile builds. Conversely, the Assassin X provides broader compatibility and a robust cooling performance, making it a better fit for users with higher TDP CPUs. The value ultimately hinges on the specific needs of the user—compactness and design versus versatility and performance.

Which should you buy?

Choosing between the Cooler Master i70C ARGB and the Thermalright Assassin X 120R SE V2 ultimately depends on your specific needs and system requirements. If you prioritize a compact, aesthetically pleasing cooler that excels in low-profile cases and offers sufficient cooling for moderate CPUs, the i70C is an excellent choice. Conversely, if you require a versatile and robust cooler capable of handling higher TDP CPUs while maintaining quiet operation, the Assassin X is worth considering. Both coolers bring unique strengths to the table, so your decision should align with your particular usage scenario and personal preferences.