Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler vs S-Union New CPU+GPU Cooling Fan Replacement for Nitro 5 AN515-43
Updated August 2026 — The Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler outperforms the S-Union cooling fan in terms of cooling efficiency and compatibility, making it the better choice for high-performance needs.
The Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler outperforms the S-Union cooling fan in terms of cooling efficiency and compatibility, making it the better choice for high-performance needs.
Why Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler is better
cooling performance
Higher TDP capability of 120W to 245W
compatibility
Supports multiple Intel and AMD sockets
noise level
Operates at a quieter 25.6 dB(A)
Why S-Union New CPU+GPU Cooling Fan Replacement for Nitro 5 AN515-43 is better
price
More affordable at C$29.99
specific use
Designed specifically for Acer Nitro laptops
warranty
Offers an 18-month warranty
Overall score
Specifications
| Spec | Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler | S-Union New CPU+GPU Cooling Fan Replacement for Nitro 5 AN515-43 |
|---|---|---|
| Brand | Thermalright | S-Union |
| Price | C$46.90 | C$29.99 |
| Noise Level | 25.6 dB(A) | N/A |
| TDP Capability | 120W-245W | N/A |
| Warranty | N/A | 18 months |
Dimension comparison
Introduction to CPU Cooling Solutions
When it comes to maintaining optimal temperatures for your computer, selecting the right cooling solution is essential. The Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler and the S-Union New CPU+GPU Cooling Fan Replacement for Nitro 5 AN515-43 both serve distinct purposes in the realm of CPU cooling, catering to different needs and preferences. With prices at C$46.90 and C$29.99 respectively, each offers unique features that appeal to various user requirements.
Brand Overview and Reputation
Thermalright, with over 20 years of experience in the cooling industry, is known for its commitment to research and development in computer accessories. Its Peerless Assassin 120 SE ARGB model reflects this expertise through robust construction and innovative design. In contrast, S-Union, while perhaps less established, focuses on specific replacement solutions for Acer Nitro series laptops, ensuring compatibility and reliability. The brands cater to distinct segments of the market, with Thermalright appealing more to PC builders and enthusiasts, while S-Union targets users needing direct replacements for existing components.
Design and Build Quality
The Thermalright Peerless Assassin 120 SE ARGB features a double tower design, measuring 125mm x 135mm x 155mm, which provides enhanced cooling efficiency. The cooler is crafted from aluminum with metal fasteners for both Intel and AMD platforms, ensuring durability and ease of installation. On the other hand, the S-Union cooling fan is designed specifically as a replacement part, focusing on compatibility with various Acer Nitro models. Its design prioritizes straightforward installation, but it lacks the elaborate cooling technology found in the Thermalright model. Overall, the Peerless Assassin stands out with its robust design intended for higher performance.
Cooling Performance
Cooling performance is where these two products diverge significantly. The Thermalright Peerless Assassin 120 SE ARGB boasts a thermal design power (TDP) capability ranging from 120W to 245W, supported by six heat pipes and dual PWM fans that can reach a maximum airflow of 66.17 CFM. This level of performance is suitable for high-end CPUs under heavy loads. Conversely, the S-Union cooling fan is specifically designed for laptop CPUs and GPUs, offering direct cooling solutions but lacking the extensive performance metrics of a standalone CPU cooler. Users seeking high-performance cooling are likely to favour the Thermalright model for its superior specifications.
Noise Levels and Operation
Noise levels are an important consideration for any cooling solution. The Thermalright Peerless Assassin operates at a noise level of 25.6 dB(A), which is relatively quiet for a high-performing air cooler. This ensures that users can enjoy a silent working or gaming environment while maintaining effective cooling. In contrast, the S-Union fan does not specify its noise levels, which could be a concern for users who are sensitive to sound. The known noise levels of the Peerless Assassin make it a more appealing choice for those prioritising a quiet operation alongside cooling efficiency.
Compatibility
Compatibility is a critical factor when choosing cooling solutions. The Thermalright Peerless Assassin supports a wide range of Intel sockets, including 115X, 1200, 1700, and 17XX, as well as AMD’s AM4 socket, making it versatile for various CPU builds. In comparison, the S-Union cooling fan is tailored specifically for the Acer Nitro 5 and Nitro 7 series laptops, which limits its use to those specific models. Users with custom PC builds or those looking for more flexibility may find the Thermalright cooler’s compatibility an essential advantage over the S-Union replacement fan.
Price Analysis
In terms of pricing, the Thermalright Peerless Assassin is listed at C$46.90, while the S-Union fan replacement is significantly more affordable at C$29.99. This price difference reflects the varying target markets and intended uses of each product. The higher price of the Peerless Assassin is justified by its advanced cooling capabilities, higher build quality, and broader compatibility. However, users seeking a cost-effective solution for specific Acer Nitro laptops may find the S-Union fan to be a reasonable option without requiring extensive cooling performance.
User Support and Warranty
User support and warranty provisions can greatly influence purchasing decisions. The S-Union fan offers an 18-month warranty, ensuring that buyers have recourse in case of issues, which is a reassuring factor for consumers. Meanwhile, the Thermalright cooling solution’s warranty details are not specified in the provided data, which could be a consideration for potential buyers. The clarity and duration of the warranty from S-Union may make it a more appealing option for users prioritising reliable customer support and assurance of quality.
Which should you buy?
Ultimately, the choice between the Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler and the S-Union New CPU+GPU Cooling Fan Replacement hinges on your specific needs. The Peerless Assassin offers superior cooling performance, compatibility with a wider range of CPUs, and quieter operation, making it ideal for PC enthusiasts and gamers who demand more from their cooling solutions. Conversely, if you are looking for a budget-friendly replacement fan specifically for an Acer Nitro laptop, the S-Union cooling fan provides a solid and economical option. Assess your priorities in terms of performance, compatibility, and budget to guide your decision.
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