ARCTIC P12 Slim PWM PST vs Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler
Updated August 2026 — The ARCTIC P12 Slim PWM PST excels in compactness and quiet operation, while the Thermalright Peerless Assassin offers superior CPU cooling and aesthetic appeal. Choose based on your specific needs.
The ARCTIC P12 Slim PWM PST excels in compactness and quiet operation, while the Thermalright Peerless Assassin offers superior CPU cooling and aesthetic appeal. Choose based on your specific needs.
Why ARCTIC P12 Slim PWM PST is better
price
ARCTIC P12 is cheaper at £18.90
noise level
P12 operates at 0.3 Sone, quieter than Peerless Assassin
installation height
P12 has a low profile of 15 mm for compact builds
Why Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler is better
airflow
Peerless Assassin has a maximum airflow of 66.17 CFM
dual fans
Peerless Assassin features dual PWM fans for enhanced cooling
aesthetics
Peerless Assassin includes ARGB lighting for visual appeal
Overall score
Specifications
| Spec | ARCTIC P12 Slim PWM PST | Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler |
|---|---|---|
| Brand | ARCTIC | Thermalright |
| Price | £18.90 | £28.79 |
| Static Pressure | 1.33 mmH₂O | N/A |
| Noise Level | 0.3 Sone | ≤25.6 dB(A) |
| Compatibility | N/A | Intel/AMD |
Dimension comparison
Overview of Product A: ARCTIC P12 Slim PWM PST
The ARCTIC P12 Slim PWM PST is a high-performance fan designed specifically for applications with limited space. Priced at £18.90, this fan boasts an impressive static pressure capability, making it suitable for heat sinks and radiators. With a fan speed range of 300 to 2100 RPM, it can efficiently manage airflow while maintaining minimal noise levels, ensuring a quieter operation.
The P12 Slim’s installation height of just 15 mm allows it to fit into small form factor cases, giving users flexibility in system design. Its 4-pin connector enables PWM PST control, optimising performance according to the cooling demands. Overall, the P12 Slim stands out for its ability to deliver strong cooling performance in compact environments.
Overview of Product B: Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler
The Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler, retailing at £28.79, is a robust cooling solution featuring dual PWM fans and an attractive ARGB lighting effect. This cooler is designed for high efficiency with a maximum airflow of 66.17 CFM and operates at a fan speed of 1500 RPM, making it suitable for demanding CPU cooling needs.
Weighing 0.97 kg, the Peerless Assassin incorporates advanced technologies such as AGHP for effective thermal management. Its compatibility with a variety of CPU sockets, including Intel and AMD platforms, highlights its versatility. The cooler’s design aims to ensure unobstructed installation, making it a practical choice for gamers and overclockers alike.
Cooling Performance Comparison
When comparing cooling performance, the ARCTIC P12 Slim PWM PST excels in scenarios requiring high static pressure, essential for applications like radiators. With a static pressure of 1.33 mmH₂O, it is well-suited for overcoming airflow resistance. On the other hand, the Thermalright Peerless Assassin, with a maximum airflow of 66.17 CFM, is designed to provide substantial cooling for CPU-intensive tasks.
The P12’s ability to reach speeds of up to 2100 RPM allows for aggressive cooling when needed, while the Peerless Assassin maintains a steady 1500 RPM, striking a balance between performance and noise. Ultimately, the choice depends on the specific cooling requirements and system configuration, with the P12 being ideal for compact builds and the Peerless Assassin for robust CPU cooling.
Noise Levels and Operation
Noise levels are a critical consideration for PC builders, especially in quiet environments. The ARCTIC P12 Slim operates at a noise level of just 0.3 Sone, making it an excellent choice for users prioritising a silent operation. Its PWM PST technology further optimises noise by adjusting the fan speed based on cooling needs.
In contrast, the Thermalright Peerless Assassin has a noise level of up to 25.6 dB(A), which is relatively quiet for a dual-fan cooler but may not match the nearly silent operation of the P12. Users who value a quiet system may lean towards the ARCTIC P12 for its superior noise performance, while those needing more aggressive cooling might find the Peerless Assassin’s noise level acceptable given its cooling capabilities.
Design and Aesthetics
Design plays a significant role in the overall appeal of cooling solutions. The ARCTIC P12 Slim has a straightforward, functional design focused on performance and efficiency, making it ideal for builders who favour simplicity and functionality. Its slim profile allows it to fit snugly into tight spaces without sacrificing airflow.
Conversely, the Thermalright Peerless Assassin features a more elaborate design with ARGB lighting, appealing to gamers and users looking to enhance their PC’s aesthetics. This cooler not only delivers on performance but also adds a visually striking element to any build. The choice between these two will largely depend on individual preferences for aesthetics versus a more utilitarian design.
Installation and Compatibility
Installation and compatibility are crucial factors when choosing cooling products. The ARCTIC P12 Slim is designed for quick and easy installation, particularly in small form factor cases where space is limited. Its low profile (15 mm) ensures it fits where standard fans may not.
The Thermalright Peerless Assassin supports a wide range of CPU sockets including Intel’s 115X, 1200, 1700, and AMD’s AM4 and AM5, making it highly versatile for various builds. With its double tower cooling design, it provides enhanced performance while ensuring compatibility with most setups. Builders looking for flexibility may prefer the Peerless Assassin, while those with compact builds might opt for the P12 Slim.
Price Consideration
Price is always a significant factor in product selection. The ARCTIC P12 Slim is priced at £18.90 for a pack of three, offering excellent value for users needing multiple fans for their build. This competitive pricing makes it an attractive option for budget-conscious builders who still require high performance.
In contrast, the Thermalright Peerless Assassin is priced at £28.79. While higher in cost, it provides dual fans and advanced cooling technology, justifying the price for users needing robust CPU cooling. Ultimately, the decision may hinge on whether a user prioritises quantity and budget or advanced features and performance.
Which should you buy?
Choosing between the ARCTIC P12 Slim PWM PST and the Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler depends largely on your specific needs. If you require a compact, quiet fan that excels in high static pressure environments, the ARCTIC P12 is an excellent choice at £18.90. However, if you’re looking for a more robust cooling solution with dual fans and aesthetic appeal, the Thermalright Peerless Assassin at £28.79 offers superior CPU cooling performance. Each product has its strengths, so consider your priorities—be it size, performance, noise level, or design—before making a decision.
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