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Cooler Master i70C ARGB Low Profile CPU Air Cooler vs Thermalright Assassin X 120R Digital ARGB Black

Updated August 2026 — Thermalright Assassin X 120R Digital ARGB Black leads on features and cooling.

The Cooler Master i70C is a budget-friendly option ideal for compact builds, while the Thermalright Assassin X 120R offers advanced features and broader compatibility. Choose based on your specific needs.

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

Price

i70C is cheaper at $19.49

Compact Size

i70C fits low-profile cases better

Noise Control

i70C has adjustable fan speeds for quieter operation

Why Thermalright Assassin X 120R Digital ARGB Black is better

Digital Features

Assassin X has a digital screen for monitoring

Heat Dissipation

Assassin X has a higher RPM fan for better cooling

Compatibility

Assassin X supports both Intel and AMD platforms

Overall score

Cooler Master i70C ARGB Low Profile CPU Air Cooler
75
Thermalright Assassin X 120R Digital ARGB Black
85

Specifications

SpecCooler Master i70C ARGB Low Profile CPU Air CoolerThermalright Assassin X 120R Digital ARGB Black
Fan Speed650-1800 RPM2000 RPM
Noise LevelQuiet≤ 29.8 dB(A)
ARGB SyncYesYes
Installation EaseEasyEasy
MaterialAluminum/CopperAluminum

Dimension comparison

Cooler Master i70C ARGB Low Profile CPU Air CoolerThermalright Assassin X 120R Digital ARGB Black

Overview of the Coolers

The Cooler Master i70C ARGB Low Profile CPU Air Cooler is priced at $19.49, while the Thermalright Assassin X 120R Digital ARGB Black CPU Cooler comes at $24.90, making it about 17% more expensive. Both coolers cater to Intel’s LGA 1700 and 1851 sockets, but they offer distinct features and designs that appeal to different user preferences.

Design and Aesthetics

The Cooler Master i70C features a minimalist design with anodized black aluminum fins that provide an elegant look while maintaining a compact profile. This cooler is specifically designed to fit low-profile cases, measuring just 70mm in height. In contrast, the Thermalright Assassin X 120R boasts a more robust design with a digital screen top cover that displays CPU temperature and usage. Its overall height is 151mm, making it compatible with most cases but potentially limiting it in ultra-compact setups.

Cooling Performance

In cooling performance, the Cooler Master i70C utilizes a copper insert and a 120mm PWM ARGB fan capable of speeds ranging from 650 to 1,800 RPM. This design efficiently handles a thermal design power (TDP) of 95W, making it suitable for mid-range CPUs. On the other hand, the Thermalright Assassin X 120R features a single tower design with four heat pipes and a TL-P12-S PWM fan that can reach speeds of up to 2,000 RPM. This configuration can effectively manage heat dissipation, although specific TDP ratings are not provided.

Noise Levels

The Cooler Master i70C is designed for quiet operation, balancing airflow and noise with a maximum fan speed of 1,800 RPM. The fan's dynamic PWM control ensures users can adjust speeds based on their cooling requirements, which is beneficial for maintaining a quiet environment during light tasks. The Thermalright Assassin X 120R’s fan operates at a maximum noise level of 29.8 dB(A), which suggests it is relatively quiet. However, its higher RPM capabilities may lead to increased noise during intensive tasks compared to the i70C.

Installation Process

Both coolers offer simplified installation processes. The Cooler Master i70C features redesigned brackets that streamline the installation on LGA 1700 and 1851 platforms, making it user-friendly for those who may not have extensive experience. The Thermalright Assassin X 120R is also noted for its ease of installation, supporting a wide range of platforms including AMD AM4/AM5 and Intel LGA sockets. However, installing on AMD platforms may require the motherboard's original backplate, which could complicate the process slightly for some users.

Compatibility

The Cooler Master i70C is designed with versatility in mind, functioning well in low-profile chassis, which is ideal for compact builds or All-in-One systems. The 70mm height allows it to fit into tighter spaces without sacrificing cooling efficiency. The Thermalright Assassin X 120R offers broader compatibility across both Intel and AMD platforms, supporting modern CPUs from Intel’s 14th and 15th generations and AMD's Ryzen 7000 series. This makes it a more adaptable choice for users who may switch platforms in the future.

RGB Lighting Features

When it comes to RGB lighting, the Cooler Master i70C features a frosted blade design that enhances lighting dispersion, creating a vibrant and customizable atmosphere. The ARGB fan can be easily synchronized with a motherboard for personalized lighting effects. The Thermalright Assassin X 120R also includes ARGB capabilities, allowing for synchronization with a 5V 3-pin motherboard connection. This feature enables users to achieve a cohesive lighting scheme across their builds, appealing to gamers and aesthetics-focused users alike.

Which should you buy?

Choosing between the Cooler Master i70C and the Thermalright Assassin X 120R ultimately comes down to your specific requirements. If you need a compact, budget-friendly cooler that performs well in low-profile cases, the i70C at $19.49 is an excellent choice. Conversely, if you prefer a cooler with advanced features like a digital screen and broader compatibility for both Intel and AMD systems, the Thermalright Assassin X 120R at $24.90 offers significant advantages despite the higher price. Each cooler has its strengths, so consider your setup and cooling needs carefully before making a decision.