Cooler Master i70C ARGB Low Profile CPU Air Cooler vs Thermalright Peerless Assassin 120 SE CPU Cooler,
Updated August 2026 — Cooler Master i70C ARGB Low Profile CPU Air Cooler wins on installation eas and aesthetics, Thermalright Peerless Assassin 120 SE CPU Cooler, wins on cooling performa and build quality.
The Cooler Master i70C is a budget-friendly option for low TDP CPUs, while the Thermalright Peerless Assassin offers superior cooling performance for demanding applications.
Why Cooler Master i70C ARGB Low Profile CPU Air Cooler is better
Price
i70C is significantly cheaper at $19.49
Size
i70C's compact design fits in smaller cases
Noise
i70C operates at lower RPM for quieter performance
Why Thermalright Peerless Assassin 120 SE CPU Cooler, is better
Cooling
Peerless Assassin supports higher TDP CPUs
Compatibility
Peerless Assassin supports more CPU sockets
Performance
Peerless Assassin has dual fans for better airflow
Overall score
Specifications
| Spec | Cooler Master i70C ARGB Low Profile CPU Air Cooler | Thermalright Peerless Assassin 120 SE CPU Cooler, |
|---|---|---|
| Fan Speed | 650-1800 RPM | 1550 RPM |
| Heat Pipes | 1 | 6 |
| Socket Support | LGA 1700/1851 | LGA 1700/1150/1151/1200/1851, AM4/AM5 |
| Noise Level | Not specified | ≤25.6 dB(A) |
| Material | Aluminum/Copper | Aluminum/Copper |
Dimension comparison
Overview
The Cooler Master i70C ARGB Low Profile CPU Air Cooler and the Thermalright Peerless Assassin 120 SE CPU Cooler are both viable options for users looking to enhance their CPU cooling setup. The i70C is priced at $19.49, while the Peerless Assassin comes at a higher price of $49.99, making it about 156% more expensive. This significant price gap raises the question of whether the extra investment in Thermalright’s cooler is justified.
Design and Aesthetics
The Cooler Master i70C features an anodized black aluminum heatsink with a minimalist design, ideal for users who prefer a clean aesthetic in their builds. In contrast, the Thermalright Peerless Assassin boasts a dual-tower design, which not only looks impressive but also enhances cooling performance. The i70C’s compact 70mm height makes it suitable for low-profile chassis, whereas the Peerless Assassin’s larger dimensions may restrict compatibility with smaller cases. For those who value aesthetics, the i70C’s frosted blade design enhances its aRGB lighting, providing a customizable luminous effect, which is less emphasized in the Thermalright model.
Cooling Performance
In terms of cooling performance, the Cooler Master i70C is designed for CPUs with a Thermal Design Power (TDP) of up to 95W. It features a dynamic PWM fan that operates between 650 to 1,800 RPM, allowing for a balance between noise and airflow. On the other hand, the Thermalright Peerless Assassin is engineered with six heat pipes and dual 120mm PWM fans that can reach speeds of 1,550 RPM. This combination likely provides superior cooling efficiency, especially for higher TDP CPUs. Users with demanding applications or overclocking needs may find the Peerless Assassin's performance more suited to their requirements.
Installation and Compatibility
The Cooler Master i70C is designed specifically for Intel LGA 1700 and 1851 sockets, featuring simplified brackets that make installation straightforward. Its low-profile design enhances compatibility with various chassis types, particularly compact builds. Conversely, the Thermalright Peerless Assassin supports a wider range of sockets, including AMD AM4 and AM5, as well as multiple Intel sockets. This versatility makes it a more flexible option for users who might switch platforms in the future. However, its larger size may require more careful consideration regarding case compatibility.
Noise Levels
Noise levels can significantly impact the user experience, especially in quiet settings. The Cooler Master i70C operates at a variable speed, allowing users to adjust the fan RPM for optimal noise control. Although specific noise levels for the i70C are not provided, its design focuses on low noise output. The Thermalright Peerless Assassin, with its PWM fans, operates at a maximum noise level of 25.6 dB(A), which is relatively quiet for a cooler of its size. Users seeking a near-silent operation may find the i70C more appealing due to its lower RPM capabilities.
Brand Reputation
Cooler Master and Thermalright both have established reputations in the cooling industry. Cooler Master has a strong presence in the market, known for its innovative designs and performance-driven products. Thermalright, with over 20 years of experience, has garnered respect for its reliable cooling solutions, particularly among PC enthusiasts. The choice between these brands often comes down to personal preference and past experiences, with both delivering products that meet a range of user needs.
Price Comparison
Price is a significant factor when choosing between the Cooler Master i70C and the Thermalright Peerless Assassin. The i70C is priced at $19.49, making it an economical choice for budget-conscious consumers. In comparison, the Peerless Assassin is priced at $49.99, which is approximately 156% higher. While the price difference reflects the additional features and performance capabilities of the Peerless Assassin, users with a limited budget may find the i70C to be a more attractive option.
Which should you buy?
Choosing between the Cooler Master i70C ARGB Low Profile CPU Air Cooler and the Thermalright Peerless Assassin 120 SE CPU Cooler ultimately depends on your specific needs and preferences. If you are looking for a compact, budget-friendly cooler that performs well for lower TDP CPUs, the i70C is a solid choice at $19.49. However, if you require superior cooling performance for high-demand applications and are willing to invest more, the Thermalright Peerless Assassin at $49.99 offers significant advantages in terms of cooling efficiency and compatibility across various platforms.

